My advice: If your girlfriend has a gay male as a best friend, be nice to him!
Straight men don't seem to understand how much sway we have with our fag hags. If we tell her to dump your sorry ass, she's likely to do it. If she has a gay friend, make him YOUR friend. If he likes you, he'll put in a good word for you. Hell, you should be thanking him. He listens to all her gossip; goes shopping with her; helps her pick out clothes; provides a shoulder to cry on; and generally makes her a nicer, more positive person. If he weren't around, YOU'D have to do all that! By the way, all the incredibly erotic and amazing sex techniques that she knows... She learned them all from him. You're welcome.