Looking for advice

Hi my bf and i are long didtance during the school year. This summer we were together and everything is perfect. Problem is when he is at school with his friends he acts so immature and stupid. Not like cheating or stuff like that but getting drunk, going to weird places in the middle of the night, over partying. I get that college is a time for fun. But i work and do school. I have never been a partier. I know i can't change him just wish he acted more respnsible and not so immature. I don't know if this is a reason to break up or not. We havent gone to school yet but i can tell its going to be a problem. What do you think? I have mentioned this and he never understands the point.