So my girlfriend's friend has been being a bitch for the past year. I've asked my girl what's up, but she just says that her friend went through some stuff and she has trouble trusting guys. The problem is, she attacks guys. Every time we're around her she just comes off with nothing but hate towards men, and I've had enough of it. I've known her for about two years, a year longer than my girlfriend has, and she's never tried to open up to me about what happened to her. I would honestly be a friend and talk to her about it, but she doesn't open up and just tries to put me and any other guy around her down. I've tried ignoring her, but on a college campus that doesn't work for more than a couple of hours. I've tried to talk to my girlfriend about it, but she gets upset that I don't like her friend even though I haven't done anything wrong. I just don't know what to do in this situation. I want to just flip shit and go off on her the next time she tries to neg me, but I know there's got to be a way to handle this situation. I'm just tired of ignoring it and keeping all this frustration pent up.

The other issue is that I have a friend who makes inappropriate remarks towards my girl and asks her to do stuff with him. I've already talked to her about it and she knows I don't like it. I need to talk to him about it, but I just don't know what to say. He's been a good friend and I don't want to lose that over this. How can I tell him to stop being so flirty, and to politely fuck off?