Don't ask me why, but there's this person on my school who makes me angry as fuck. Even if I think of her, I get in a freakin rage...

Any advice on how I can resist to beat her face up?

Draw mean, evil comics about her during class. That's how I handled those situations when I was in school. =D

Listen to music like this - http://www.youtube.com/watch?v=hQZfGa5t4e8

You won't want to beat up anything afterwards.

Fantasies are always better than what you can do to a person in real life. Just sit back, smile, and blow her to pieces in your head =].