Is the a way to get him to like me too?

There is a guy I go to school with, and he sits across from me in homeroom. He's the funniest person I have ever met, and he is quite adorable, too. He does know that I like him, but, he has a girlfriend. I only found that out today and I am surprised he did not tell me this earlier than this. Is there any way I can make him like me?