I like one of my friends she's funny, cute, smart and well get a weird feeling and blush every I see her only problem is that she is bi, dating a girl and I have almost no self-confidence.I also would feel like weird trying to brake up my friend and her girl friend. Please help!

She is in a relationship. That means she is unavailable to be anything but friends with you.

Can you handle just being friends with her? If you can't then you need to back off until you can.

As for self-confidence, do you have any interests that you are involved in or could get involved in that would help build up your belief in yourself? Volunteer work and hobbies can also be great ways to meet more people.

Yes I can handle just being friends

You can't do nothing. She is with someone who she really likes. You should feel happy that she is HAPPY.