Talk to your friend! Maybe she's going through something similar. You never know. Just make sure you trust her. People can be catty.
But what if they're not? What if she does like you? Would you want to miss out on that?
If she isn't interested, then try to accept that graciously and try to get over her. It will be hard, but that's just love and relationships in general. You'll find the right person. and you'll find lots of fun people in between. :)
If you are into girls, good for you! If you're bi, cool! Me too! If you're straight, ok! Go with what you feel. Never be disgusted by who you are :)
Stay open to new experiences!
And yeah, I agree with a lot of other commenters here about not rushing to use a label unless you're comfortable with it. I'm ten years older than you and I just now became comfortable calling myself bi.
Here's a good resource for all things sex ed including sexual orientation and gender issues.
Stay curious!
an intro: https://www.youtube.com/watch?v=pQiadPyjJ4E
Sexuality is a continuum! https://www.youtube.com/watch?v=19yZk_6_N34
Labels: https://www.youtube.com/watch?v=SRmYrl56HkA
