In this episode, we are using neuroscience and psychology to do a deep dive into a deeply frustrating but remarkably common phenomenon that dominates our minds at all hours of the day and night: our fixation and inability to mentally detach from an unhealthy or toxic ex-partner, even long after we have physically broken free.

If you have ever felt ashamed for still thinking about an ex-partner months or years down the line, it is vital to know that you are far from alone. Psychological research shows that up to 85% of people experience persistent intrusive thoughts after a breakup, with nearly half struggling with lingering emotional fixation years after the physical separation. This isn't a character flaw or a lack of willpower—it is a deeply wired biological reflex.

Unhealthy relationships are defined by chronic misalignment, poor emotional boundaries, and attachment dysregulation without systemic cruelty or intentional control—such as the Anxious–Avoidant Trap.

In contrast, toxic relationships move beyond incompatibility into systemic manipulation, power asymmetry, emotional erosion, and severe volatility—such as the Narcissist–Empath Dynamic or abusive relationships.

We will discuss why our brain pulls us into these intense, persistent loops over a former partner months or even years after physical separation—whether through rumination in daily life, sudden intrusive thoughts when we are in a healthy, loving, and safe new relationship, or grief when an ex-partner passes away.

Finally we will provide a comprehensive practical toolkit to help you detach mentally from an unhealthy or toxic ex-partner, and how to heal and process grief if an ex has died.

If you want to dive deeper into the topics from today's episode, here are the links to the primary research:

1. Relational Frameworks & Attachment Dynamics

• The Dark Triad & Toxic Personalities: Paulhus, D. L., & Williams, K. M. (2002). Journal of Research in Personality. Read Paper Here

2. Neuroscience of Fixation, Rejection, & Narrative Loops

• Default Mode Network (DMN) & Self-Referential Processing: Raichle, M. E. (2015). Annual Review of Neuroscience. Read Paper Here

3. Healing, Somatic Regulation, & Avoidant Dynamics

• Evidence-Based Trauma Therapy Protocol: Shapiro, F. (2018). Eye Movement Desensitisation and Reprocessing (EMDR) Therapy: Basic Principles, Protocols, and Procedures. Guilford Press. View Resource Here

4. Processing Grief, Suicide Loss, & Disenfranchisement

• Societal Invalidation & Stigma Overview: EBSCO's Research Starters on Disenfranchised Grief or MyGriefAssist's Factsheet on Hidden Sorrow.

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