Worth a second read.
Um. We were all very supportive last May when you were going to dump this guy. I can only speak for myself, but there is a limit to the amount of empathy I can give someone who absolutely refuses to try to help themselves.
cowboy.
the.
fuck.
up.
and stop rolling around in this guy's wake, desperate for whatever crumbs he will toss you. In particular, stop with the "I am so mad at him because he's not faithful to me" routine. You're boffing someone else's husband, and can't demand that he give you what he's not willing to give his spouse.
No more sympathy from this corner of the world -- not an iota -- until you take the steps necessary to stop deliberately destroying your life.
Boo coo sympathy, once you've done what you need to do.