This boy in my school stares at me strangely. What does it mean?

When like the teacher is in class, he does nt pay attention 2 the teacher n stares at me. When in the stares, street. He stares every time. He does nt even stop when i give him i dont like or 'what' look. He does nt talk to most girls n is rude to th teachers. Yestarday, he asked me to assist him with book of all his friends. He never talked to me b4.