Recently one of my really good friends introduced me to one of her guy friends. We really hit it off and at the end of the night we ended up making out. I told her about it the next day and she started crying and told me she had feeling for him, which i had no idea. We started hanging out more and every time the same happened but we kept it from her. I ended up having sex with him even after i knew she liked him and now i feel really bad about it. I hope she never finds out.