I have a crush on a guy in my school for 2 years and he's kind to me and listens to me. My school has something called a swing dance competition where a guy and a girl do swing dance together and the whole school can compete. My crush asked me to the dance but he just said he wanted to go as friends. I was so excited and I acted nonchalant and said yes happily. But I remembered my mom who would never let me dance and would probably hit me. So I just told him my mom said no. But my best friend apparently likes him now. I've noticed it for a while she copied how I spoke and my lisp. I thought she was the type of person who just wanted to be simaler and fit in. She asked my crush and he said no. But then she kissed him and had sex with him while we were on call. She sent me photos of them in bed. I don't know if I did something wrong but maybe she wouldnt have done this if I didnt reject him.