Heartbreak

Why some relationship endings impact neurodivergent nervous systems so hard, and what might help.

I write from lived experience as a neurodivergent person, informed by research I find genuinely illuminating. If any of this resonates, please take what’s useful and leave the rest. If you’re neurodivergent and looking for 1:1 coaching sessions then I invite you to connect with me via my website: www.drlilconsults.com

Photo by Marah Bashir on Unsplash

We tend to assume heartbreak is grief for a person. Sometimes it is, but sometimes what we could be grieving is the collapse of an internal world we can no longer explain.

A relationship is a shared experience and it’s a shared model of reality. Every interaction answers questions we rarely ask out loud: Who are we? Who am I with you? Can I trust what I perceive? Is this safe? Are we moving in the same direction?

Over time, the answers settle and become assumptions we stop noticing until a relationship fractures – which can happen in any number of ways, of course. Our internal model of reality – carefully built – often collapses with it. Everything that made sense has to be reconsidered.

In a way, the internal relational model we build is similar to a house of cards. It may feel more robust than that, but perhaps it isn’t as sturdy as we like to think it is. When a relationship fractures we’re left with a messy deck of cards that’s mostly fallen to the floor. We try to pick up the cards – “pick up the pieces,” as we sometimes hear people say – and “move on.” However, sometimes the cards resist our efforts to pick them up. Sometimes gravity itself won’t cooperate. Sometimes we feel stuck or frozen because everything has changed so rapidly and surprisingly. Sometimes making sense of what happened feels overwhelmingly impossible.

This is what I call “epistemic rupture”: consisting of an emotional loss and a structural one, too. Without a coherent structure, our understanding slides sideways and this may not necessarily stop on its own accord.

The brain hates unfinished patterns

One of the most useful ideas from cognitive neuroscience is predictive processing – the observation that the brain isn’t a passive recorder of experience but an active predictor. It’s constantly building models of reality and asking, given everything I know, what happens next? When reality matches the prediction, nothing much happens. When it doesn’t, that mismatch – a prediction error – drives learning and revision.

Usually this works beautifully. You update the model, the world makes sense again, you move on.

However, a relationship ending without explanation or only partial explanation, creates a prediction error that can’t resolve. The brain keeps trying anyway. Perhaps this. No. Maybe that. No. Months, even years later, it’s still searching. Unfortunately, this can inaccurately be labelled as “obsessive” or an inability to “let go.” However, what could be happening is this: the internal model can't complete itself.

Why neurodivergent minds may feel this more acutely

Many of us build extraordinarily detailed internal models of the people we’re close to. We notice subtleties – micro-shifts in tone, timing, word choice, consistency – that others might miss entirely. Over time, a relationship becomes a rich, densely interconnected map.

When that map suddenly stops matching the territory, the collapse is significant. We’re not just losing a person. We’re losing thousands of interlocking predictions at once, and the entire landscape has to be redrawn from almost nothing.

This has little, if anything, to do with being “too sensitive” or “too intense.” It’s indicative of how much structure was built, and how much comes apart. We’re looking at the deck of cards scattered on the floor again. Except now, instead of a single deck of cards, we’ve multiple decks strewn in many directions. It’s exhausting to look at, let alone sort through.

Coherence is a form of regulation

We usually think of emotional regulation as calming the body: breathing, grounding, slowing down. Those help, but for many of us, calm also comes through understanding.

Think of the relief of finally getting a medical diagnosis after years of unexplained symptoms. Nothing has physically changed in that moment, and yet the nervous system often visibly softens. That may be because uncertainty has become coherence. Meaning itself can be regulating.

This tracks with predictive processing: when a more coherent internal model becomes available, the brain no longer has to keep spending energy on unresolved prediction errors. The nervous system settles because there’s clarity. The reverse is also true. Relational confusion can stay activated for a long time. The brain is still trying, uselessly, to update an obsolete internal model.

When there’s no explanation coming

Life doesn’t always provide explanations. Sometimes people can’t explain themselves. Sometimes they won’t. Sometimes they don’t understand themselves either. Sometimes shame prevents honesty, or trauma fragments memory, or avoidance simply wins, and they disappear.

This means coherence may never be provided by the other person. This is where repair from relational rupture takes an unexpected turn.

We mistake explanation for closure

Many of us can spend years believing: if only they would explain, I could finally move on. However, what we’re often seeking isn’t explanation. We’re seeking coherence, and these aren’t the same thing.

Explanation comes from another person. Coherence is something we build ourselves.

This distinction is subtle, but it’s liberating, because it changes the question. Not will they ever tell me what happened, but can I build a model of reality that’s honest enough, spacious enough, and compassionate enough to let me move forward, even with some questions left open?

Notice that this doesn’t require total certainty, and that, unto itself, may not be easy at first. However, it’s still encouraging to know that the construction of a renovated or new relational structure doesn’t require every loose end tied off. It requires a framework sufficiently cohesive to hold the rest of your life again.

This pattern is bigger than heartbreak

Once you see it, it shows up everywhere. A late autism diagnosis, and suddenly your childhood makes sense. Of course, nothing in your past changed, but it’s been reorganised. A moral injury, and you realise that you were responding to impossible circumstances - nothing external changes, but something internal does. A family secret uncovered. An abusive relationship finally understood. A spiritual or intellectual awakening.

These aren't the same experiences, and they don't heal the same way – moral injury asks something different of us than abuse recognition does, and both ask something different again from a diagnosis. But underneath those differences, something structural repeats: the facts may have existed all along. What changes is usually the internal coherence of the system holding them together. That's probably why insight can feel so physically relieving. It doesn't necessarily solve the problem, but it lets scattered experience settle into a pattern.

The astute reader will note that insight leading to internal coherence can come from external sources. There’s no denying that if the person who had caused a relational rupture clearly explained their behaviour, it could be relieving in some way. Likewise, if a therapist or good friend provided explanations that felt true, this could also be relieving. So, explanations can be helpful when it comes to relational repair. This isn't a contradiction of what I wrote earlier so much as a widening of it. The point I’m trying to make is that rebuilding internal relational repair isn’t solely dependent on external explanations.

Repair as restored coherence

What if repair from relational rupture wasn’t always about fixing ourselves, or even about recovering from pain, but about the gradual restoration of coherence?

As already mentioned, I don’t mean perfect coherence. The cards don't all need to go back exactly where they were. In fact, some cards may need to be rearranged quite differently. Some cards may never be used again. Some cards may prove to be more vital than others.

Living systems are never perfectly coherent; they stay adaptive, open to change, capable of reorganising as new experience arrives. Their coherence is dynamic, not fixed. What we’re building towards is a coherence spacious enough to hold contradiction. It’s flexible enough to say:

Some things I still don’t understand. Some people will never explain themselves. Some endings will never fully make sense, and yet, I no longer need my life to wait until every unanswered question has an answer.

This is a different kind of stability.

Heartbreak doesn’t necessarily need closure. It may need coherence – an internal world integrated enough that you’re no longer organised around the unanswered questions.

Every mystery may not get solved. However, when understanding holds both what you know and what you may never know it may be possible to slowly repair from heartbreak.

However, I need to make one thing clear at this point. I’m not saying that all heartbreak is fixable or everything can be “healed.” What I’m proposing is something different. I’m suggesting that there’s relief in coherence. There’s some blessed peace instead of ongoing nervous system perturbation.

It's also important to appreciate that coherence doesn't only bring relief. Confusion and internal dis-ease has a way of disconnecting us from our nervous systems. So when coherence returns, it can release emotions that had no outlet until then. Relief may be there, but so can sadness and other emotions.

Ten Steps for nervous system repair:

If any of what’s written here resonates, here’s what rebuilding coherence can look like in practice. This isn’t related to the usual stages of grief - this is an internal model of repair.

1. Name what actually broke. Not “I miss them” – although that can be a perfectly legitimate thing to say and feel – but for this exercise try this: “my model of who we were stopped matching reality.” This reframes the pain as disorientation, not only sadness, which makes it easier to work with.

2. Stop outsourcing coherence to the other person. Notice every time you think “if only they’d explain.” That’s a request for someone else to finish your internal model. Redirect the energy inward: what do you actually know, independent of their account?

3. Write the timeline without the other person in it. Not the story of the relationship – the story of what you observed, felt, and did. This starts rebuilding a model anchored in your own data, not the other person’s unavailable testimony.

4. Let some cells stay blank. Actively practice the sentence, “I don’t know, and I may never know.” This isn’t giving up, it’s telling your brain the prediction error can close as unresolved rather than stay open and searching indefinitely.

5. Rebuild in small, verifiable pieces. Don’t try to explain the whole relationship at once. Pick one confusing moment, gather what evidence you actually have, and let that one piece settle before moving to the next.

6. Watch for false coherence. Sometimes we build a tidy story just to stop the searching, even if it isn’t accurate (for example, by over-blaming yourself or over-blaming them). Ask: does this explanation hold up, or does it just feel like relief?

7. Track the nervous system, not just the narrative. Notice when your body settles as you build a piece of understanding – a slower breath, shoulders dropping from your ears, your jaw unclenching. That's the signal coherence is doing its regulating work, separate from whether the facts feel complete.

8. Expect the map to keep needing edits. New information or memories may surface later and revise things again. Living models stay open to revision.

9. Find people who can hold ambiguity with you. Not people who need you to have a tidy verdict on what happened – people who can sit with “some of this still doesn’t make sense” without rushing you towards false closure. Sometimes saying something out loud to someone you trust can alter what you think and feel about it. Also, your sympathetic listener may offer a perspective that’s resonant.

10. Redefine the finish line. Nervous system repair isn’t, “I finally understood everything.” It’s “my life no longer waits on the parts I’ll never understand.”

Final Note: This essay isn't a theory of every relationship ending, and it isn't a substitute for support when a relationship was unsafe. If what you're piecing together involves abuse, the priority isn't building a coherent story of what happened – it's safety first, understanding later, ideally with a therapist who can hold both. This framework also isn't the only lens on why endings hit some of us harder than others – attachment style shapes this, too, and if "searching for explanation" is a pattern you recognise across many relationships, not just this one, that's worth exploring with a professional alongside anything written here. And if the searching itself doesn't ease no matter how much coherence you build, that's worth taking seriously, too; sometimes what looks like an unfinished pattern is actually a nervous system that could use more support than an essay can offer. None of that undoes what's written here. It just means coherence is one part of repair, not the whole of it. Predictive processing is real and well-supported in cognitive neuroscience, but applying it specifically to relationship loss and grief is a metaphor/hypothesis I’m offering, not a validated finding.

Go gently, dear reader.