Heya,
OK, I'm new to this forum but I'd just like to get my problems out and see what you think I should do, any advice would be amazing thanks

If you don't want all the details there's the basic problem in a few words at the bottom.
Right: I'm 16 and in year 12 at school, hoping to do medicine at uni when the time comes. So exam results and things are pretty important to me as I need AAB really to get into medicine. My boyfriend is 18 and in year 13 at a different school near to mine, and he's off to uni in Bristol next year.
We've been together 2 years during which time we've helped each other through a lot - we've both had exams, stress with families etc. that we've talked to each other about, and for the first year or so I loved him to bits. Our relationship seemed to fall into routine after the first year though, and I started having problems. I am really scared of being dependant on people, possibly rooted in the fact that my parents split when I was little..? But that's besides the point. I hate being ill as it means I have to be cared for, and I hate people feeling sorry for me. I feel as if I have to be the best all the time - not due to the pressures of other people, but myself. I've always come top in things since I was a little kid and I push myself to try and do the same now. I get frustrated with faults in other people, as I feel (and I know this is wrong) that it's their fault for not trying as hard to be perfect as I feel I am a lot of the time.
Around this time last year, things suddenly changed between me and him. I think the stress of GCSEs (which I took very, very seriously, in retrospect), the fact that he was getting ready for university, plus the fact that I was just maturing in general, led to a change in my personality. I went from the happy-go-lucky cheerful, never-stressed girl he started going out with, to a completely neurotic mess. I cried a lot and got stressed, and because I hated asking for help with stress (I still do), I wouldn't tell him things and just took it out on him instead.
He thought that although I was changeing and maturing, I was still in essence the same person he initially fell in love with, so stayed with me and supported me. Both of us thought that once GCSEs were over I'd stop being stressed and upset all the time. We were wrong. I got a job over the summer and was constantly frustrated that I couldn't have the freedom I wanted, as I worked 4 or 5 days a week. I also felt I was drifting away from my friends, and blamed that on the fact that for the first year of our relationship I spent all my time with him and his friends and not people from my school.
After the summer we both went back to school, and I continued to be stressed and angry a lot of the time. I often felt angry at him for no conscious reason either, just little things about his personality that annoyed me: the fact that he was always asking if I was ok, little jealousies about him being better than me in school, stupid things like that. But I began to think that it was because I was falling out of love with him, or was just bored with the routine of the relationship we found ourselves in. Especially as other guys were showing romantic interest in me and I couldn't do anything about it.
In December we almost split up, but I panicked and backed down. The same thing happened in January. I began to feel completely torn apart by the thoughts in my head that I was only staying with him cos I was afraid of being single after so long, and because I liked the security of a boyfriend, rather than because I actually loved him properly.
Don't get me wrong: it wasn't as if I hated him or anything. At times I felt so in love with him that I wanted to stay with him forever, spend hours gazing at him, doing nothing, lying there feeling his arms around me.. And he said he loved me too: he still does in fact. But the rest of the time (especially in the past few weeks) I've treated him like crap. Not shown any gratitude for the things he does, and got annoyed with him over little things like being ill (like I said earlier, it seems like weakness and that just annoys me).
So the other night he phoned me and said that he wanted me to be aware of how he was getting hurt by the way I was treating him. And the way the conversation went on, it just felt like we were going to break up. I knew I cared about him a lot, but it suddenly occured to me that maybe it was just friendly love rather than romantic love that I was feeling for him. We don't have sex as much any more since I tend to be stressed and tired a lot, which fits with the friendly love thing. So I said that night maybe we should go on a break and see what happens after a week apart.. but that I felt like I didn't really love him any more. He said he still loved me, but was willing to let me go if I felt it was better, and that he'd rather not be in a relationship if I wasn't in love with him any more.
So, here we are. 5 days into the break, and I keep spontaneously crying because I miss him and feel stupid for what I've done. I don't know how I feel any more: if I just miss the security of being in a relationship, or if I really really do love him.
It's going to be very hard if we do break up: we're both musicians so see each other out of school a lot for rehearsals and things. People have known us as couple for so long that it'd be so strange to break up. We're going to Reading Festival together this summer as well, which will be awkward. Also, I found out the other day that a friend of mine fancies me, which is very confusing.
My friends have advised me different things: One says I should move on as I'm only a teenager and should be experiencing new things while I'm young, and that I should get out of the relationship before I start resenting him. Others say I shouldn't throw away a relationship that can be patched up, especially as he still loves me, and we'll probably split up when he goes to Uni anyway meaning I have loads more time to experience new things before I go to university next year. I just don't know what to do. Any advice from your experience would be helpful please (and sorry for the incredibly long mother of a post!).
Summary:
Currently on a break with boyfriend of 2 years
He still loves me.. I don't know if I love him.
The unsureness could come from the fact that I just like him a lot as a friend, or because the stress of school is getting in the way of my feelings for him.
I don't want to split up just yet as it'd be hard, and probably pointless since we're probably going to break up in September/October anyway so we may as well enjoy the summer in each others' company.
But if we stay together I don't want it to be just a farce.
Should I stick it out or break up with him? It feels like I love him.. but I'm not sure if that's just desperation. Is there a way of telling? Help please!