A stupid boy and a foolish girl

I didn't really want to bring boy issues back into the picture on this blog because it just felt a little bit wrong to do that. I would've stayed completely away from the whole topic but recently there's been something that's really affected me.
I have been friends with this guy for awhile now and we talked a little bit at the end of summer and, when school started, we started talking even more. At first I was just happy being friends with him but then things started to change.
He was being increasingly nicer and sweeter and more charming and he made me feel so special. I was nearly on my way to being head over heels for him, to be honest. Then, all of a sudden, he wouldn't reply to my texts even if we were in the middle of a conversation, he practically avoided me at school and, when I did see him, he barely spoke to me. It was like I didn't even exist to him anymore.
I don't understand how he could be so nice and pay so much attention to me and the moment I start to think I might have feelings for him, he just disappears.
I'm so utterly confused and it's so frustrating trying to figure it all out. I want to yell at him and punch him and make him feel as miserable as I do right now but at the same time, I do still care about him, even if it is just as friends. I definitely don't want to not have him in my life but I don't know if I can and still be happy.
It's a little bit unfair, I think, that here I am, sad and lonely and altogether not alright, wasting my time thinking about this stupid boy and he's off going about his day, completely not bothered at all, because I really wasn't that important anyway.
~Wannabe