My husbund goes out and drink w/some of his ex(s) too. Some of his ex(s) can be friends of mine but of course some I really don't like. It really depends if he lies to you and go out w/her or if he truthfully tells you. I know it's not going to be a very good feeling when your husbund or bf goes out w/his ex but if they really have nothing, it's just a kind of social maintainence. Try to turn it on your side. If your ex asked you out which you 2 really have nothing and you tell your husbund. Your husbunds gets mad.......how do you feel? Maybe you'll feel there's nothing between the 2 of you and you guys are just friends. If he gets mad then it means he doesn't trust you. Of course you can always tell him your feelings and tell him try to stay away from his ex but I don't think it's a good idea to "NOT" letting him go. Let him decide if he should go or not.