Hello, I need opinions on a disagreement my boyfriend and I are having. We have been on and off for over 5 years, and we are both 23 years old. During the off periods, he slept with multiple other girls, and I slept with one other guy. This guy happens to be in the same college program as me, and we slept together in 2nd year. We didn't have any feelings for each other and it was just a drunk thing. He has now been dating his current girlfriend for about a year and a half now, who is also in our program. We are in a small program, so almost everyone is friends. I have his girlfriend on facebook. I'm not sure if she knows about what happened between her boyfriend and I in 2nd year, but she is a really nice girl and we are friendly with each other. My boyfriend knows that I slept with that guy, so I have him blocked on facebook to make him feel better. Today he realized that I also have this guy's girlfriend on facebook, who I've been friends with for 4 years. I could have sworn he already knew.. but I didn't think it was a big deal. Now he is threatening to break up with me if I don't delete her off facebook. I don't understand why I cant be facebook friends with her. We see each other at school once in a while and it would be weird if I deleted her because we have so many mutual friends who talk. Anyway, the real question is WHY does my boyfriend want me to delete her? Should I?