Insecurities and crush

So I have a crush on this girl and I think she knows. I already confirmed that she is not straight. I have some classes with her and we talk a little bit but not that much. A friend of mine was the one that talked to her and told her that a girl had a crush on her. Since I was too obvious she thinks it’s me. She said that I’m cool but we don’t talk that much so she doesn’t know me that well. She also said something about we could have something special or something. My friend just told me she used the word special.

My problem is that I don’t know how to interact with her. I try to talk but I’m so shy and my anxiety wins. Also, I am afraid that I talk too much and she figures that she’s just not interested or that I’m awful and ugly and stuff. I don’t kno