I really like this guy but I don't think he likes me as much. At first I thought he did cause he would let me play with his hair and told me he doesn't let anybody play with his hair the way that he lets me and all sorts of little things like that , that I would catch on to and the thing is that I really like him, I don't know what to do cause in science class he said that he likes this girl and wishes she was his girlfreind, I don't know this girl at all I only know how she looks so I can't really see what he likes about her, But this question is ( mostly to guys ) what should I do to get her out of his head and me inside ,instead?? Help pleasssee

There's nothing really you can do to "make" someone feel that way about you or think about you.
Honestly the only thing you can do is to keep hanging out with him, being yourself. You could tell him how you feel, though I don't know how comfortable you are with that.

Here's the thing.. guy's can be pretty unpredictable if you ask me, maybe this girl is just someone he's using to get you jealous, considering he lets you flirt with him in that sort of way... But like Aries said, you can't make him like you, just be yourself and if he and you keep on at it, maybe he'll get over that other girl and like you.. just keep it up, and remember, always act confident no matter what... boys love that.