Ive suggested seeing a therapist (if not for marriage than at the very least for his own personal issues) but he flat out refused. He has cut back on the drinking because I made the suggestion that that is why he isn't sleeping well and he tested it and it worked. (Surprise surprise?) I want to stay and work on it but I fear that staying will only suffocate him more and make the problem worse. I want to give him the space he needs to work out his issues. I guess I just need to accept the possibility that he won't make the choice to come back.
He also hasn't mentioned anything about the divorce since his initial request (and even then he didn't even say the words divorce, he said "go our separate ways"). I certainly am not gonna be the one to bring it up.