What should I do about my crush?

I am asian and I have a crush on a caucasian girl and it is pretty spontaneous. We've been in choir 3 years together, but it was just recently that I became infatuated by her. I can't get her out of my head, and it gets worse because she's in like half of my dreams. In one dream, I tripped and I became very embarred because she saw me, and the other dream we were walking casually together while I had my arm around her. I don't ever remember any other crushes I ever had being this intense. I'm really shy so when I have a crush I just leave it alone until it goes away. She tries talking to me sometimes by I'm always to shy to have a real conversation with her. Recently we had a long texting conversation because she had a person labeled on her phone that she didn't recognize and she texted me and we had a long conversation and got to know each other a little bit more. I am starting my senior year in high school and I just find it weird that I would have a crush on her so spontaneously. We never hugged before and I'm not sure if she likes me either. Maybe I'm just like this because I crave a relationship because I never ever dated before. I don't know what to do.. should I just wait until my feelings for her dissapear?