Am I a lesbian or bi or what? I'm crushing majorly on a girl?

I wouldn't label yourself quite yet. After all, your mind is still reeling from your first attraction to another girl. Give yourself time to sort this out because no one but you can know for sure. No matter what, though, you've got feelings for this girl. Right now, try to ask her out on a date. I'm sure she'd be flattered at the very least.