He's ashamed and guilty of his actions. My WW has closed out every single person that really cares for her M, as they would not condone her behaviour. She now only keeps her new friends around. Meanwhile i've told the world, which was probably not a good thing, if an opportunity for reconciliation arises.
As for the anxiety, it's because after you have spoken to him, you wonder what he's thinking, is the chat going to bring you two closer, or take you farther away. That's when you need to rather live in the moment, your moment, look around you, keep him out of your head.
You don't need to do anything about the D, let him do all the work, sign when you're happy. Not for him, but for you.
Do you deserve a no-good cheating husband? No one does.
Just cos things are going right, doesn't mean that they were always wrong.