What if a gay guy you knew from college, you find out is the husband of girl who's a friend of yours?

This is a tricky subject. It's quite possible she knows about this period in his life. It's also quite possible she doesn't know at all. Her husband could be bisexual, or an in-the-closet case. But the fact he used to have a boyfriend, and was hanging out at gay bars, I don't think that last one is the case. I wouldn't say anything to her, at least until u become rly good friends. Even then, I'd only say something until otherwise proven that she doesn't know. Because otherwise, u could be messing up a rly good marriage. So just hold off, until u get to know her better as a friend, and get to know better about her and her husband's life. I hope this helps u...;)