Ok.-sigh- I need advice...I like this guy

...and he's my somewhat friend aaand i don't know what to do but i really like him. He kinda hates me but we have fun together. We are like siblings fighting, laughing and shit like that. But sometimes he says he hates me but i know thats not true. I don't know how to tell him i like him. Can you guys help me out and tell what i could do? OH...And i have no classes with him sorta.