Whats gone wrong?

When me and my Bf started going out everything was amazing - infact it was amazing before we were going out aswell- but resently things have been awful.
i have been messed around a bit in the past so i take things to heart quite easily and i read into things, but i would never have the courage to talk about them.
anyway resently things between him and me have not been great, i cant remember the last time he text me or called me. we were together on friday night at a party and everything was amazing but then as soon as hes on msn to me he's mood as hell.
about a week ago he nearly broke up with me, saying something aobut the future and not knowing whats going to happen ( he has just left our school)
but then straight after he apoligized and said he didnt mean it.
He is taking his GCSE's at the moment so it could be stress, but what stress would make you say "k" after i had said "i miss you"

i just dont understand whats going on, i feel so trapped because im into him so much and he has such control over me, yet i hate it becuase at the moment hes not making me happy.. hes making me unhappy

what do i do?

Hm. A lot of thoughts are spilling into my mind at the moment, so I'm gonna lay it all out:

1`. I do think that you are looking into it a wee bit too much, but I also see the reason that you're freaking. It could possibly be stress -- or it could just be something going on that you don't know about. OR, he could be having one of those "Moody Phases." We all have them once in a while. I say, you give him some time. If it doesn't change after, say a few days to a week, it'll be time to ask him. Or you can just ask him now. I'd personally do that, but then I'm not exactly a relationship guru.
2`. You need to cut him some slack. "yet i hate it because at the moment he not making me happy.." Relationships aren't meant to be all "Whoopee!" all the time. You're gonna have to get through problems and harsh moments in order to grow stronger. From what I can tell, he's not exactly jovial either. So talk it out with him. Because if you're both unhappy, and you don't work it out, something's gonna go down the drain.
3`. And my last and final thought -- though small, I'm still gonna lay it out there -- you may have never had the courage to talk to your boyfriends about these thoughts in the past, but it's time to just stand up and open your mouth now, honey, because if you don't speak up, no one's gonna speak up for you. And if you keep going the way you're going, you're always gonna feel trapped because there's all this freaking out that you're not letting out.

You're happy he has control over you? ..erm.

he sounds immature and completely -not- ready for a relationship, i'm guessing he's around your age, which is practically too young for him it seems. saying 'k' to 'i miss you' is just plain mean and rude. if you aren't willing to talk to him about it, tell me, what exactly are we meant to help you with? so communication is a no-go and all forms of conversation are out of the equation?

then you're going nowhere and you might as well break up with him now. if you don't want to be honest, dump him.

I feel you, My boyfriend gets credit, and sends me 2 messages, and cals 3 times and 30 dollars worth is gone, I didn't see him today, yesterday when we used to spend everyday together.
When we go to make love he can't be aroused any more, My nan passed away and we didnt have sex for a week, and then when i was ready he couldn't and said It didnt feel right, then the time before was because i went out and he said that because i was at a pub other guys were there...
And the other time I said I wanted him and said some sexy things to him and he told me "Im not having sex with you" And I was very offended we had had sex 4 times in 3 weeks... It is disintergrating..
He tried the other night but i didn't want to because i had things on my mind and I am unsure on wether the novelty has worn away..... :(