Well, I'm living with my AH while we divorce, and it's essentially no contact... We don't talk about anything except the kids. There have been times when I tested the waters, so to speak, and try talking about us, or the drinking... And it NEVER, NEVER went any place good.
That has been the motivation I need to stick to no personal contact. I just plain old feel better when I don't engage... And you would too. Give it a try.