Can all you Boys out there help me?

So there is this boy I really like. He steals my water bottle everyday, gave me a hug once, asked to look at my homework even though he is really smart, and today he veered off in the hall just to play hit me on the head and to ask me why I was on the 3rd floor. I recently found out that he has a girlfriend who is in the grade below us at a different school. I think he likes me but up until now I am no longer sure. Why would he do all of the above things if he did not like me? Can someone help me??????