Girlfriend's A VAMP Guy's A TEACHER

So my girlfriend is a vampire. I didn't find out until our second date. I don't know what to think about that. I'm a nerd, she's the hottest girl in school. Another thing, I'm a teacher. A nerdy teacher! Science anyone? So this is a MAJOUR problem. At least she's 18 and it's not totally illegal or anything. But still:

My girlfriend's a VAMP.

WHAT DO I DO!