The work is one added beat. You already name the loop — most fearful avoidants can narrate their own pattern in real time. What's missing is the gap between naming it and acting on it: the pause where you notice you're building an exit and don't send the message, don't cancel the plan, don't start the fight that would settle things by ending them.
Split the thought when it comes doubled. "I want closeness but it feels dangerous, but pulling away feels like loss" is not one thought — it's three, and they need different responses. The fear deserves compassion because it came from something real. The prediction deserves examination because it's about a past relationship, not this one. Flattening them into a single verdict is what makes the whole thing feel unsolvable.
Prefer slow over intense. Fearful avoidance is destabilized by fast escalation and by high-drama conflict, both of which feel more familiar than steady warmth. Choosing the relationship that feels slightly boring over the one that feels electric is, for this style, not settling — it's treatment.
Tell someone the pattern while you're calm. "When I go quiet after a good week, that's the fear, not a decision" gives a partner something to work with, and gives you a version of yourself on record that the mid-loop version has to argue against.