Being bullied in school, what should I do?

Okay, so I get bullied in school every day, not only by short kids (Much younger than me) But others my age, And I'm pretty sure Next year I'll be very bullied. Everyday I go outside at the time, and get Bullied there, at 12:00. I then get made fun of because of my long hair, even by the girl I have a crush on ( :( )! I go outside, I try to stay away from them as much as possible, but after awhile they come up to me, and make fun of me if I run. I run most of the time, but cannot run forever. I get pushed around very harshly (Into the walls/Poles/Etc.) and have a bloody nose almost EVERY day. My arms are very bruised now, also. The teachers do not tend to do anything whatsoever, Even whenever I am RIGHT Beside them. They do nothing about my bloody nose or anything. But I am also to shy to tell the teachers, Even though I do have a fractured jaw from one of them, and all they did to the person was Expel them. I bet they're like this right now: "Woot, That was worth punching that kid in the jaw, now I get to play video games EVERY DAY!!!!". The "Gang" Of bullies always walk around me, giving me no time to think to my self (I talk out loud whenever I speak)(I also Need my own space sometimes, I feel very uncomfortable if not). My father told me to just fight back, but if I do that the whole gang will go up on me (I'm weakest in cl, Unfortunately, Who knew going to school filled with black kids would make it a school filled with BODY BUILDING black kids?) This has gone on for 3 weeks now, and I really want it too stop, what should I do?