First of all let me say I'm sorry you found your way back here again. I'm sure this is not the place you want to be.
I would urge you to go to counseling. Even if you cannot save your marriage, you can still save you. I've been in C for almost 5 months now and it has made all the difference in the world.
I would not move out if I were you, if he's so miserable he can move.
"Everyone you meet has baggage. Find someone who loves you enough to help you unpack." ¤Formerly DelinquentGurl¤