Emotionally abusive boyfriend and breaking up

Yeah, I know what I need to do. I need to cut off my relationship with my boyfriend of a year. I am fifteen years old, and I am in an emotionally abusive relationship. I do not know HOW to break up with my boyfriend. He is my age and lives on my street, which makes it even harder to get away as I’m sure you realize. I have tried numerous times to break up with him, all in person (I would never break up via text or IM), but he always begs me. First he is angry and pissed at me until he realizes I’m not going to give in, and then he cries, and I can’t stand it. I know I am not in the wrong, and it is perfectly natural to want to move on, especially because this is both of his and my first relationship. He is controlling over the music that I listen to (It is because I like depressing music and such, and he thinks it has a bad effect on my mood), as well as the pictures I put on my wall and the websites I view on the computer. He is in the process of trying to get me to close my a social site account because he “doesn’t know who I am talking to or talking about and it bothers him” which I know is completely wrong, because that is typical controlling behavior. The bad completely outweighs the good in our relationship, and I’m just tired of trying to please him. He doesn’t like the way I dress, and I’m not trying to be shallow, but he does not complement me often. I would never expect him to say that I looked good every time I saw him, but at least once. He does not support anything that I am doing currently or like, and he is trying to make me buy medication to remove some scars on my wrists from a year ago when I cut myself (I was very depressed and have moved out of it, but he still sees me as “disabled” in his eyes, which pisses me the hell off.) I also have a problem with walking on my tip-toes (weird, right?) because that is the way that I learned to walk, and he is absolutely convinced it is his duty to change the way I walk and to make me “better”. I do not know for a fact that it is harmless to do this and he says it can cause spinal issues (which I am going to research after this), but he uses it as an excuse I feel, to tell me what to do and how to do things. I know it’s supposed to be in my best interest, but come on. When we’re having an argument he does it to piss me off. “walk flat-footed” is basically something he would say while I’m trying to talk and without realizing it standing on my toes. I know I need to break up with him, I just don’t know how. I don’t know how to stop giving in when he cries and gets upset, because I feel guilty. I feel like he needs me and that he cares about me, but he sort of takes me for granted. He’s not always directly nasty, but he calls me stupid names. even things such as “n00b” as I’m sure many of you are familiar with. he also calls me a bitch sometimes but tells me he’s kidding, and he touches my breasts even though he knows I hate it. I just want out… but I’m not sure what to do, if I break up with him and he starts to bug me and call me all the time. :( I’m just sad and want out.