Please do not group us all up in the same basket.
I certainly hate the term *girl gamer* I am a gamer fullstop just like anyone else that games be they female or male. This tag disturbs me quite a bit and doesn't seem to help females in the gaming community at all.
As to the rest of your post, to me sounds like childish games, which I can assure you men are just as capable of too, most women that play just want to play the game, they don't want drama and hassle. We aren't loggin in to bitch about folks behind their backs or cause hassle.
Not to mention alot of guys cause the drama between themselves and females in the first place, yet it's the women that are always seen as the *bad* guy in the situation.
I can also assure you that I as do many others have many female friends and male friends in game. Hell my guilds 50/50 female/male and has been for over 6 years, but I guess seeing as we're all pretty much mature and decent human beings we haven't had the issues that most people tend to think are caused by females.
Women and men can be just as emotional/nasty/sneaky as each other. Please stop using the *oh its a girl* excuse, we just want to play the game like any man out there, stop judging us by our sex.
As to the OP: Move on, honestly if she doesn't want to talk to you then leave it, she will either come around of her own accord, or won't. I know it sucks to lose friends, or have arguments, but sometimes you just have to walk away from it all, to save your own sanity. Go find a realm/guild that you can have fun on doing things you enjoy, meeting and making new friends. Goodluck