This guy in my class likes me but my best friend likes him a lot what should I do??

If she is your good friend, she should not say that to you. She should say "I'm happy for you because he likes you." The feeling between two people should be mutual and if he doesn't like your friend, you can't change his feeling. If you going to try to do something for your friend, you are going to hurt her more and you are going loose his respect for you.