I am in a small community college. There is a person here who is, to put it plainly, a bully. He harasses my best guy friend and I, constantly claiming to anyone who will listen that my friend and I are "going together". And of course, everyone believes this guy, so now I have to rush around and do damage control-- "No we are just friends, no we aren't going out." etc., not because I don't like my friend, but because rumors flying around are not good and can get out of control quickly. He also is very mouthy to our Professor in a class we both have together, and takes the opportunity to bully me there as well. His being mouthy to the professor and being smart mean I can't learn as much as I could because our learning is being punctuated with the professor trying to get him to shut up.
I can't stop it without being impolite. I admit one day I did go off on him, telling him to "Shut the ehell up." when he was saying something again. Finally Monday I just decided to ignore him. It didn't work. I can't retaliate and well, frankly, we are in college, we have long since left the playground and childish bullying should no longer be happening.
Any way I can handle this situation gracefully?