I'm very sorry about your awful situation. Perhaps you could clarify for us what would be success in your situation? Do you hope that within a few weeks or months, he'll come back to you, stop drinking and having affairs and commit to a monogamous relationship until the end of time?
I also suggest that you create your signature, like mine. It helps fellow posters to get a quick grip on your situation.
M39 D6 D3 (at S) S 2014-09 D 2016-09
"You can't start a fire sitting around, crying over a broken heart" - Bruce Springsteen.