I have a question regarding sex but also emotions. I've had the same boyfriend for 3 years and we have haven't had a sexual partner before each other. We love each other greatly but his best friend and me have gotten to know each other better and one night, we kissed. We didn't mean it to happen but it did and it almost happened again but I stopped it the second time around...so when I have sex with my boyfriend, it feels great during the action...but then I always feel down in the dumps right after. Is it because I'm not ready to have sex again until this situation clears my head or am I completely turned off on having sex with my boyfriend? I love him greatly but sometimes I don't feel as sexually attracted to him as I am to his best friend...please help me! Thank you.