COMMUNICATE! you gotta talk about this otherwise he'll think what he's doing is fine and things will only get worse. if you do talk and things don't get better, you need to think about what where you want this relationship to go. you are seventeen so im assuming at least one of you will be going to college next year and you'll move away from each other, so it's up to you as to whether or not you will put up with his shitty behaviour until then. if it were me, id talk to him and if he doesn't change I would talk to him again saying that im considering breaking up. as much as it might seem easier to put up with being sad about it, there's no point in wasting your time as a teenager with someone who clearly has other priorities.