My first kiss will be a stage kiss?

Okay, so this year for spring musical, I got cast as one of the leads. I'm a freshman, and I've never had a first kiss. The main guy part and my part have to kiss at the very last scene, and I'm kind of nervous. We'll call him A. A is very cute, and he flirts with everyone, including myself, but here's the thing: he has a girlfriend. I know stage kisses don't mean anything, but I'm afraid it'll mean something to me because I have somewhat of a crush on him. Do you have any advice???