My friend's girlfriend confessed that she is very attracted to me, we've been friends (through her boyfriend) for a few months. I find her attractive but don't want to mess with her relationship at all. I'm currently living with this friend and currently don't know what to do. Very surreal situation, this sort of thing has happened twice before and it seems to fuck all friendships up; can anyone give me some advice?
(EDIT: "this sort of thing happened twice before" means it's happened in the past with OTHER girls who have a boyfriend, not the same one!! important detail you guys may have misinterpreted.