I am terrified of High School, help?

I am very afraid of high school. From what I hear from my friends, a lot of the upper cl-men don't like me. (I don't even know what I did) I really do not have an issue with them liking me, as much as if they are going to make fun of me or haze me or not. I am going to be a freshman and I know that freshman get picked on, but I already know the kids don't like me, and I feel I will get it a lot worse. This has gotten me very upset over the course of the summer and I just want to move, but I don't want to leave the few friends I have in my grade already, and my girlfriend. I just want to get through high school without getting made fun of or anything. Can anybody give me any advice? Just anything, I am so afraid of the cles, the upper clmen, the sports. I just feel like everybody is going to and already does hate me. I just need a little advice, anything you have to help get me through this. Thank you.