Why do girls hate me for NO apparent reason!?

Im going into grade 12 and just don't get it, girls that don't even know me hate me! New people coming into school, naturally girls in school. I stopped hanging out with girls because it results in bullying, backstabbing and so many other things that make me sick to my stomach. I get along with a few girls and mainly guys. Theres no big deal with hanging out with guys, Im not wh*ring around with them or anything. Im so sick of it, even the bit*hy girls aren't hated as much as me!