Codependency is enmeshment disguised as love: your identity, mood, and sense of self are determined by another person's state. You have no emotional life independent of the relationship. Their happiness is your happiness. Their crisis is your crisis. Their needs always supersede yours — and you call this "being loving."

The spectrum: Independence/Isolation — "I don't need anyone" (avoidant attachment at the extreme; self-reliance as a defense against vulnerability). Codependency — "I need you to be okay so I can be okay" (anxious attachment at the extreme; other-focus as defense against facing your own needs). Interdependence — "I am a whole person who chooses to share life with another whole person" (secure attachment; connection without enmeshment).

Interdependence requires: a stable sense of self that doesn't dissolve in relationship, the ability to tolerate your partner's distress without making it yours, maintaining your own interests, friendships, and identity, and the capacity to ask for what you need without demanding it.

The test: when your partner is upset, can you be empathetic WITHOUT becoming destabilized? If their bad mood ruins YOUR day, that's enmeshment. If you can hold space for their experience while maintaining your own ground, that's interdependence. The difference is Bowen's differentiation of self — the foundational concept of relational health.