How do I get her to like me when she's too good for me?

There's this girl that I recently kinda like, but I've had past experiences with girls and I just get hurt every time. I wish I didn't fall in love, but I do. I fear that I may be falling in love with this one girl, but she's just so amazing and I know she'll just cause me pain in the end. I used to like her a while ago but she had a boyfriend and I was so hurt by the pain that I thought it would be a good idea to just shut everybody out of my life. She's really beautiful and talented and I don't know if I'm worth that. Another reason why I think she's too good for me is because she has perfect pitch, which essentially means she has the ability to hear a note and give the name of the pitch with nearly 100%, if not 100%, accuracy. My choir teacher says I also have perfect pitch, but it's "undeveloped" and I'm still in the process of developing it and learning how to use it effectively, since I just started singing last year. I'm worried I'll completely **** up with it and feel like I'm not even worth her time because of that one mistake. Though perfect pitch is also one of the reasons why I like her. And supposedly she's also not allowed to date, though she has said that it depends on the guy. This would mean that even if I can appeal to her and get past the fact that I may not even be worth her time in the first place, I'd still have to appeal to her parents. She smiles at me a lot, which is what caused me to like her in the first place, but I have no idea why she does that.