Should I break up with my boyfriend?

I'm 15 and he's 16 and we've been going out for almost 3 months. I still really love him but for the past week he's been acting really weirdly. He seems like he doesn't want to talk to me, he doesn't reply to my texts, and he never goes on AIM. Since he's a grade older than I am we don't have any classes together at school, so at lunch or break time we usually hang out and when we do we hug and kiss all the time but this past week we just stand there and we don't really talk. It seems like he wants to break up with me but he's done doing it and it's really horrible just waiting around for him to do it. But if I did do it, and he didn't want to break up then I would be really sad because it's not like I WANT to break up. I just feel like if he's going to be ignoring me and not even trying in the relationship there's no point. I also think that maybe he wants to break up and the only reason he hasn't done it yet is because I am clinically depressed and I've said I wanted to kill myself a couple times and I've cut myself before so I think he thinks that if he breaks up with me I might kill myself or something. Should I break up with him or wait and see what happens? May 14th is our 3 month.