Yes. You have suffered enough pain and embarrassment. You do not have to do anything else for this guy. This latest bit of news is probably just what you needed to know to finally cut the tie, to stop the communications, and to let him figure out how to deal with the consequences of his own behaviors. This could even "help" him in hitting rock bottom and finding himself ready to get straight. But that would be his business. You, on the other hand, have done what is right enough, and this is asking too much of you. Give yourself permission to say enough, you've had enough, and you just aren't going to live like this any more. Treat yourself with the respect you deserve. That is how you get others to treat you the same. Good luck!