Thanks for your replies. I realized when i read it back that I didn't make my post short -- just the opposite. Sorry to make you read through that long mess.
Two weeks ago my H was telling me how much he wanted our M and that he would make it up to me ... that he would start supporting me the way i've supported him... that i would see all the changes he's making. That lasted about a day. Now he's back to being vacant again. I think he can't stay away from her, although i'm not sure becuase he had been here every night this week (we live apart). He is just cold and almost nasty to me now. He doesn't answer my calls half the time. What the heck happened to the person two weeks ago saying that he wanted to do what it takes to fix our marriage.
Our MC thinks that he may be suffering from a mild depression or a mood disorder. She sees his pattern of chasing that feeling... that thing that will make him feel good. He keeps bouncing back and forth thinking that the other is the answer to his problems. He told me again yesterday that he doesn't feel things for people. He said that it's what he's been working with his counselor on, but doesn't feel he's made progress. I'm waiting for another bomb to drop.
A big part of me wants to just say... "go do what you have to do. if and when you fix yourself, then maybe i'll be here.". But the other part of me doesn't want to be the one to call it quits. I'm afraid i'll regret it. Any advice at this point? I really want to save my M.