I feel so ashamed. I cheated on my boyfriend with my bestfriend. My bestfriend had always had a crush on me and he was going the US for his education. I went to say goodbye the day before he was leaving and we ended up kissing for quite a while. I didn't initiate it but I didn't push him away either. Now my best friend has gone and we haven't talked about it yet and neither have I told my boyfriend. I love my boyfriend and I didn't plan on things to go way this way at all, what do I do?