All addictions follow the same blueprint. Quitting sugar, giving up a toxic habit, ending a relationship you’ve been emotionally dependent on for years – the brain doesn’t distinguish much between them. A pleasurable or soothing experience activates the reward system, dopamine floods in, and suddenly the brain is wired to seek that feeling again and again.
Emotional dependency works the same way, with one crucial difference: the object of addiction isn’t a substance. It’s a person. Affection, dopamine, and oxytocin become so entangled that the brain begins to associate a specific partner with safety, comfort, even survival. After a breakup, withdrawal kicks in fast, and many couples find themselves locked in a cycle of splitting and reuniting that feels both painful and strangely inevitable.
Psychologist Montse Cazcarra, author of Amor sano, amor del bueno, argues that this pattern typically stems from a fear of losing connection and an inability to sit with the discomfort that comes with relational instability. “This dependence can result from an emotional history marked by fragile, unstable, or conflictual relationships — punctuated by loneliness, abandonment, and uncertainty,” she explains. Our past doesn’t write our future, but it does shape the defaults we fall back on under stress.
Reconciliation, she says, offers temporary relief from a very specific cocktail of pain: the grief of a severed bond, the loneliness of being single again, the fear of never finding someone else. When those feelings become unbearable, sending that message feels less like weakness and more like self-preservation.
Psychologist and toxic relationship specialist Deborah Murcia traces the roots even further back, to childhood. “Some people grow up believing that love is unstable, that it must be earned, and that it can disappear overnight. That’s why painful relationships feel so familiar to them.” The brain, she explains, can mistake emotional intensity for romantic connection when in reality, the intensity is a signal of dysfunction.
Why the relief feels like love
After a difficult breakup, reuniting triggers a rush of dopamine and oxytocin. The contrast between acute distress and sudden relief makes the dynamic neurologically addictive. “The more painful the relationship or the breakup, the more intense the relief when you reconcile, and the more indispensable that person becomes,” says Cazcarra. The problem is that this relief is easily mistaken for evidence of love when it’s actually evidence of dependency.
Murcia calls this codependency: the feeling of being nothing without the other person. “Their needs come before your own. Every reconciliation feels like a rescue, even when nothing has changed. That’s exactly what keeps the cycle going.”
The phases of the cycle
The pattern tends to move through recognizable stages, though not always in the same order, and they often overlap:
A period of tension, where arguments accumulate and distance grows. A rupture, bringing anxiety and a hollow, disorienting fear of loss. Reconciliation, which floods the system with relief and closeness. And then a honeymoon phase where everything feels resolved, until the tension quietly begins to build again.
“Our brain doesn’t like the unknown,” Cazcarra notes. “It will always prefer familiar pain over unfamiliar uncertainty.”
Breaking the cycle
Both experts are clear: this isn’t a willpower problem, and it isn’t easy to exit. The first step, according to Murcia, is naming what’s actually happening, identifying the toxic dynamic for what it is, and cutting off contact to give the brain a chance to break the addiction loop. Cazcarra cautions against minimizing the difficulty of this. Deciding to stop is one thing. Holding that decision through the discomfort is another.
Practical steps that help:
- Learning to feel difficult emotions without reaching for your ex as a regulator.
- Identifying which old wounds are being reopened with each cycle.
- Examining the internal narrative — “we can’t live without each other,” “this must mean we’re meant to be” — and questioning it.
- Practicing self-compassion, especially when the emotions are ugly or contradictory.
- And slowly building a sense of inner security that doesn’t depend on another person’s instability.
“We can get through it,” says Cazcarra, “but it requires grieving, enduring the discomfort of emotional withdrawal, and gradually relearning that we are capable of building something healthy.”
That relearning is slow. It’s also the only way out.
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