At the core of the frenemy dynamic is . Psychologists distinguish between "supportive" ties and "aversive" ones, but frenemies fall into the category of "ambivalent connections"—relationships where positive and negative sentiments coexist in a stressful equilibrium.

Frenemies often manifest through subtle, behaviors rather than overt conflict. Common indicators include:

: Research suggests that ambivalent relationships are more physically taxing than purely negative ones. The uncertainty of whether you will meet "Dr. Jekyll or Mr. Hyde" keeps the nervous system in a state of high alert, potentially leading to increased inflammation and even accelerated cellular aging .

The term "frenemy"—a portmanteau of "friend" and "enemy" first popularized by gossip columnist Walter Winchell in the 1950s—describes a uniquely modern existential dread. Unlike a pure adversary, whose hostility is predictable and therefore manageable, a frenemy operates in the "grey zone" of social interaction. This relationship is defined by : a state where the outward performance of friendship is fundamentally at odds with the internal reality of competition or disdain. 1. The Psychology of Ambivalence