I don't mean to come out as sexist but many females, particularly teens and young adults, can be vicious. This is why I am almost never able to get close with a female my age or younger than me; most woman that I've ever been close with were in their mid-late 20s or even 30s; a woman who matures enough to be kind and compassionate to people can be a truly beautiful person. Unfortunately, the brain doesn't typically fully develop before one is 23-25, therefore, a girl younger than that is more likely to be an immature little bully.

I guess all I can say is find female friends who are actually mature and don't treat people like crap even if you must befriend people a little bit older than you.