Talk to him!
Get to Know Him -- But Not Illegally
Even dorky guys like to talk to people! My guess is that he'd love to get to know someone who likes him.
I'm not suggesting you get romantically involved -- that's illegal. He could lose his job and even go to jail.
Show Interest in His Interests
But, I do suggest that you show him you like him by talking to him. Ask him questions about where he went to school, what theatre he has done, what are his plans for your class.
He Could Be Your Soulmate
It can be really valuable to get to know your teachers as people in addition to knowing them as teachers. My guess is that you've found a "soul mate."
Rachel, the best way to get guys to notice you is to get them talking about themselves. It's sick, kind of, but it's true.