Homicidal thoughts about this kid in my school?

I have had it with this kid at my school. He goes around spreading rumors about me and he goes out of his way to make my life miserable. I want him hurt. I want to hit him in the face so bad. However my conscience always holds me back and I end up hitting MYSELF in the head with a book or a piece of wood. What should I do? I can only turn my head so many times. No matter what the teachers do, he wont stop ruining my life. What do I do?