Do you think it's okay that I have a crush on my supervisor?
I think I need more information before determining if it's okay. Are you and your supervisor about the same age?
Yeah, she's only a few years older than me.
Then I think it's okay. You cant' help it when you are attracted to someone else no matter who they are. You are experiencing a natural feeling, and it would be ok to act on your feelings as long as your supervisor is single as well.
Why is that?
It's okay to have a crush and even act on your feelings, but if they're in a relationship then it would be inappropriate.