yea so 标题 says a lot of it. I'm 14, he's 15

and we've been dating for almost 9 months. we go to different high schools, so we pretty much only see each other nights and weekends. he is super impulsive, serisoly.

and he's been talking about sex for like a month, but recently, he's become 更多 aggressive/pushy. like if we were kissing, he would get ontop of me (which is pretty normal) except he will like kind of hold me down and start doing stuff. if I tell him to stop he stops what he's doing but doesn't move, he justs tries to talk me into it. he also has started 接吻 me up against the door. and he holds my shoulders/hips then to.

it's getting a little scary, I have bruises along my arms from him and on my hips. he just doesn't 移动 if I tell him. I've started avoiding being alone with him but I can't do that forever. what should I do? what do I say? I know this sounds niave but I really like him and I want to avoid breaking up with him if it's possible.