So i've been with this guy for over a year and a half. he's my first boyfriend and he's the sweetest ever. he's helped me through some really tough stuff and he's one of the four people i actually feel comfortable talking to outside of school, and the only one of my friends that i'm comfortable talking to on the phone. The thing is, that i feel like i'm obsessed. I feel like i need to talk to him at least once a day, which i believe is reasonable; but when he's gone for about an hour and i don't know where he is i slowly panic more and more. a lot of times i'll just sit in front of my phone and wait for him to call me back or text me back. then i call again and a few more times, and i try to keep them at least 20 minutes apart, but sometimes its 2 minutes or 10 minutes and it feels so long. last night, his mom said on the phone that he would call me back, then i called about an hour later and he said "i can't talk right now". So three more hours pass and he still hasn't called me. withing the next hour i'd called him 15 times with no answer, texted him twice, and called his house two times. he texted me later and said that he just got out of the movies. i get my hopes up a lot when he's online or something and i get kind of sad when he doesn't respond; and a lot of times, after we hang out (which is rare during the school year) i'll text him before he even parks in his driveway. i tried to go a day without calling him or texting him and i couldn't do it. what's wrong with me?

I think you might be overdoing it, though. And you run the risk of suffocating him and him wanting more and more time away from you. It's just a theory but I'm wondering if you're suffering with your self-esteem and, now you're in a relationship, you're treating the "relationship" as self-worth. When you're not in contact with him, something seems missing, or maybe you feel yourself to be less somehow. It's difficult to get a picture via words on a page, but you sound like a nice girl. You come across that way. You have to realise that you're valuable too, as an individual. That you're bringing your own qualities to the relationship, rather than the relationship is giving you qualities you didn't previously have.
I also think you're going to take your first relationship break-up very hard indeed. For the sake of this relationship, you have to back off a bit and see what level of contact is a good compromise between what you want and what he wants. Also, talk to him about it. Maybe make a joke of how much you contact him and see how he reacts.
Good luck, by the way. I hope everything works out the way you want it too.
JUST CHILL!!!!!!!!!!!!!!!!!!!!
You have a real chance of scaring the guy away because he'll end up feeling harassed.
He didn't go to a movie, he was avoiding you. Eventually it will get worse and he'll stop answering your texts. He'll shorten phone calls and conveniently be busy whenever you call or request a date. Then he will be talking to more girls and complaining more. Finally he will cheat and dump your clingy ass.
Call him at least every two days or so if you must. Just get a life outside of your boyfriend.