Anxious attachment is a relationship pattern in which a person deeply desires closeness but fears abandonment, staying hypervigilant to any sign of distance and pursuing reassurance to calm that fear.
An anxious avoidant relationship can work, but only if both partners take responsibility for regulating themselves instead of trying to change each other, because the cycle is fueled by each person's instinctive reaction to the other.
There is no reliable statistic for how often avoidants come back, but they tend to return when the pressure that triggered their retreat lifts, because avoidant distancing is an effortful strategy that breaks down over time.
She is avoidant if there was genuine early warmth that pulled back right as the connection deepened, and she is just not interested if the effort was low and flat from the beginning with no warm phase to point back to.
Dealing with an avoidant partner means responding to their distance with calm, non-pressuring presence, because pressure is the one thing that reliably triggers their pullback.