what to do???

Ok, so i fell in love with this guy and i love him to death. The only thing tha tsucks about this relationship is tha ti'm going t obe graduateing in about 3 months and well hes a freshman in high school and i really don't want to leave him just go to offto college. well even if i wasn't dating somone 3 years younger then me i really don't think i'd want to go off to college rigth after high school. I need tiem to figure things out. like what i wan t to go to college fro but everyone keps telling me just to forget the guy and just leave. this guy and i broke up once before and he told me that he wanted to date me again just to see where things went, is he just using me or what?? i rellly need help wit htis