Why You Miss Toxic People

Have you ever caught yourself missing someone you know wasn’t good for you?

Maybe an ex who caused chaos? A friend who constantly drained your energy? Or a family member whose approval you still crave, despite years of hurt?

When thoughts like this begin to fill your brain you might start to think: What’s wrong with me? Why do I still feel this way?

But let me assure you, if you’ve ever felt this way before, you’re not broken. Your brain is doing exactly what it was wired to do: hold on to attachment, even when it’s painful.

In this post, we’ll unpack the hidden psychology behind these feelings and explore why toxic connections can feel addictive. Then I’ll share a step-by-step “emotional detox” framework to help you rewire your attachment system for peace and freedom. For a deeper dive, you can listen to the latest episode of Mental Health Bites here or on Apple Podcasts. You can also find more short clips and helpful tips at my YouTube channel.

Let’s dive in.

The Science Behind Missing the Wrong People

Attachment is at the core of this experience. Our brains are designed to bond. In childhood, that bond ensures protection and safety. But in adulthood, those same neural pathways can make us cling to relationships that recreate early familiar patterns, even if they’re unhealthy.

When you’re in a toxic relationship, your body often cycles between stress and reward. It can be helpful to think of it like a slot machine where unpredictable attention, affection, and validation keep your dopamine system hooked. Although the highs might feel euphoric, the lows can be devastating.

That pattern of intermittent reinforcement is the same mechanism behind gambling addiction; and it’s why your brain keeps checking for emotional “payouts.”

Neuroscience research shows that heartbreak lights up the same brain regions as physical pain. This is why when a relationship ends, you can feel like you’re going through withdrawals. Your system craves that chemical cocktail of dopamine, oxytocin, and cortisol that once defined the relationship.

This is why logic alone doesn’t cut it. You can know someone isn’t good for you, but your body still remembers the rush.