What does it mean when a guy asks you to chill with him does it means he wants to just watch a movie or something or he wants to have sex with you?

Depending on the guy, it most likely means he just wants to hang out with you. Watch a movie, get some dinner, but most likely as just friends. But, if he checks you out a lot and he's that kind of guy that dates a lot, it probably means he just wants to sleep with you. But, I think that he sounds like the kind of guy who just wants to go out as friends.