How to get over this?

My boyfriend of two years broke up w me yesterday because our relationship is unhealthy. I'm 16 and so is he. I cried my eyes out and I thought of all the sacrifice I put into this...him. I lost my virginity to him, I care about him so much. Well after he did that I called him and I basically told him that I can't loose him I'll try so hard but all I want is to be w him. So we got back together but were on a break. I'm going to be a junior, him a senior. So last night he went to a party he promised me he wouldn't go to. He invited his best friend but he didn't invite me until I made a big deal about it. I don't drink bc I'm an athlete an that's just my choice. And he changed his fb password so I couldn't go on it when he's at the party. I went over to my gfs house and her and her mom had an intervention for me. I'm too sad rather then happy. I KNOW what I have to do (end it) but it's two years.... EVERYTHING in my room is him. When I get bored I write on things, on books, on boxes, just little things about him or his name. I planed a future w him. Ik it's going to suck so much. This is the first break up that I just can't do it. Right now I'm not strong Enough. Please help