The term 'toxic relationship' is not a clinical diagnosis, but it describes a real and well-studied dynamic: interaction that systematically depletes, devalues, and constrains one or both partners.
Relationship researcher John Gottman identified interaction patterns that most reliably predict relationship breakdown: persistent criticism of a partner's character (rather than specific behaviour), contempt and disdain, defensiveness instead of accountability, and emotional "stonewalling" as a way of avoiding conflict. These four patterns are known in the literature as the "Four Horsemen" of relationship breakdown.
Other signs include constant control, isolation from friends and family, dismissal of a partner's feelings, and cycles of "rupture and reconciliation" without any real change in behaviour.
Prolonged unhealthy relationships often create a pattern resembling emotional dependency: periods of warmth and attention alternate with periods of devaluation, and it is precisely this unpredictability — not stable closeness — that sustains attachment most strongly. This is not a character flaw; it is a well-documented psychological mechanism known as intermittent reinforcement.
Work on this topic typically includes: restoring the ability to recognise one's own boundaries and needs, addressing beliefs such as "I don't deserve better" or "this is my fault", building a plan for safely leaving the relationship if that is the goal, and support during the period after separation.
There is no need to wait for a situation to become "bad enough". If a relationship consistently triggers anxiety, guilt without a clear cause, or the sense that you constantly have to "brace yourself" around a partner, that is already sufficient reason to seek a consultation.
I offer online consultations within the CBT approach. The first session is about understanding your request — no pressure, no obligations.
Book a consultation