T.Y.
I agree with the other moms that say to bring her and let her watch for awhile. My son also did the same thing with karate. He started participating after I got up with him. At a few minutes he would forget that I was even there. It might take a few times for her to warmup to the class but eventually she'll get over her fears b/c she'll be having fun. She has to learn to deal in social situations at some point and the longer you wait the harder it is. Good luck.