Someone's stalking me at school! What should I do!?

Well, there's this person in my school. He's a guy. We're in the same grade, take same cles and breaks. A few people -- well, 2 people says to me that that guy likes me. I accept that, but the truth is that I don't like him and I don't like any boy in school because -- well, I just don't. But anyways, the problem is that he keeps stalking me. Like every day, when I had to leave school early (since there's personal family problems, I can't say cause it's too private) and I had to go to my locker to pack up and BAM! He's always there at his locker making it seem like he's 'pretending' to go and get something from his locker. and everywhere I go especially in recess he always plays soccer with his so-called friends near me everywhere i go and it's so ANNOYING!!! ugh! i can't stand it anymore. oh, and at lunch he sits near me where he can 'look' at me. it's so frikkin annoying! i mean, what should i do? I HATE IT WHEN PEOPLE STALK ME!!!