If you're a girl with pretty much all guy friends and the girls make fun of you for it, what do you do?

Ok, I'm a major tomboy and half the time at school I'll get yelled at by the losers who think they are the fasion police for wearing a pair of pants to school that I got at Quicksilver instead of Roxy. (I get the guys stuff for free from my dad, he used to be a Quicksilver rep, he was for 15 or 16 years, I can't help the fact that I get cool clothes for free!) They also think I'm just friends with them because I want all the guys, but it's because they're easier to get along with, as I DO NOT usually get along with girls at all. How do I get this through to them? How do a get these bitches off my back? My buds don't understand why I let it get to me, I try not to but, they are guys so I don't exactly expect them to understand. Help from girls and guys would be nice for this one. (Not really sure about the catagory so sorry if it's in the wrong one)