Distancing himself can be worse than avoidance; it can be a way to punish you for putting your foot down about the way he treats you. A certain number of my clients leave their partners once they realize that their abuse really isn’t going to be tolerated anymore. But the more typical approach is to remain physically present but to retool the machinery to churn out passive aggression instead of open hostility. He learns how to hurt her through what he doesn’t do instead of through what he does.