How can you talk to a guy you don't really know if you like him and he knows that you like him?

You both like each other so that's a plus :] Nice job. But now you have to let your friendship grow before you can be in a relationship. Get to know each other more. Just drop subtle hints like asking him for help on homework or to let you borrow something. Then ask for his opinion on movies, homework, classes, etc... Start with small talk so you guys can end up getting closer together.

Good luck :]