Ok, there's this boy I like that's a Freshmen like me in high school & at the beginning of the year, I thought he was really annoying & as time went on, I realized that he was cute & I had a crush on him.

If he has a girlfriend already, he may not appreciate that kind of attention at the moment. You could just let him know that the 2 / 3 of you could be friends.

He could also be playing "Hard to Get". Now that he knows that you like him that way, he does not feel the need to be the chaser. I know these silly little games do create such a problem, but you could simply tell him that if he is not seeing anyone, then you are interested, and suggest an activity that the 2 of you could participate in. Not as a date - but as a group of friends.

If he continues to act strange, move onto someone else - really life is too short to be playing games. There are many guys out there that do not play games, and you would feel much better with. Do not allow any guy to make you feel bad about yourself - for any reason.

Try to spend time with him or observe to see what he's like, I'm not telling you to change yourself, just try to find similarities between you two, hopefully he will like you more and will want to be with you. :)

Ok this isn't really an answer but just wanted to say I'm going through the exact same thing! Just at least your guy dosn't ignore you. :(