So it seems, after reading all that... that Mr. Wonderful will not remember any of it tomorrow and start the process all over. It's called rinse and repeat!
You are not going to make any head way with this guy as long as he's drunk n playing the victim. All drunks are victims. Remember that! Everything you do to him because of his choices are your fault. That is what an alcoholic wants you to believe.
Stand firm with this guy. You say no, mean it. Sounds like you're done with it anyway. There is going to be no easy way for Mr. You're Missing Out on Me to take it like a man. His, I'll kill myself bull is nothing but him attempting to guilt you back into his life. He's more than likely throwing everything at you but the kitchen sink to keep you for his own deluded purposes to feed his addiction.
My advice... MOVE ON AND KEEP MOVING!