Try to stay close to him. Just the fact that he was attracted to this bio-hazard honey, plus all the drinking and driving, means that he has extreme self destructive impulses. He may indeed be suicidal. Most people would be after going through all that. He needs to stop feeling sorry for himself, start thinking logically, but of course there is no way to force him.
Some of the most level headed guys I know turn into the most irrational wusses when dealing with woman. Why is that?
Wemenz can be evil, no dispute, but if you play with a rattlesnake and get bit, what is the point of blaming the snake? If your friend is blaming that crazy ho, then he is not learning the lessons that he should be. It was His fault for being the enabler. Sad but true. Hot, needy crack ho's undoubtedly have their attractions, but there is a reason that sane people do not fall in love with them....
Ultimately, your friend needs to examine what self destructive impulses got him into this situation to begin with. Good luck with it. Keep us posted.