Two weeks of good-morning texts, planned dates, and conversations that go past midnight. Then a switch flips: replies shrink to logistics, the energy drains out, and you start drafting theories about what you did. Then the warmth returns like it never left, and the relief feels so good you don't ask questions.
Hot and cold isn't one behavior. It's one surface pattern with at least three different engines underneath, and the engines need opposite responses. Two of them are attachment patterns: a fearful avoidant push-pull, and an avoidant deactivation cycle. The third is breadcrumbing, which isn't an attachment pattern at all. It's an effort-allocation strategy.
Getting the engine right matters because the most common mistakes are crossovers: treating an avoidant's regulation as manipulation and blowing up the relationship, or treating a breadcrumber's strategy as a wounded nervous system and spending a year being patient with someone who was never coming closer.
