This is an extension from the plot in https://www.physicsforums.com/showthread.php?t=404778" If you've forgotten or you haven't read it before and can't be bothered going through all that text, here's a summary: My girlfriend had found this new friend which would constantly talk to her in any way possible and would ask her to go out together as friends. I knew better of what his intentions were and she was oblivious to them. I told her to not be friends with him because he's obviously trying to get with her, but she believed him when he said it's just as friends. A few weeks later he said he likes her, she distanced herself from him for a week but cherished his friendship so she became friends with him again. I told her I wasn't comfortable with this because it's not possible that he could go from liking you to having no feelings whatsoever towards you in a matter of days. Eventually I just let it go and allowed her to be friends with him. Now here comes the continued part... She's started to believe that he likes her again because of some pretty clear indications which I haven't bothered to ask about. She told me about how she'll turn her facebook status to single and pretend to be single for a bit and see if he makes a move. I was cool with it and was happy to have her realize the truth this way, but when I asked her what she'll do about it if she finds out he does like her and she said nothing, she'll still be friends with him I felt pretty annoyed with that but I managed to shrug it off. So she decided to not go ahead with that plan since she's still going to be friends with him either way and she just wants to avoid the awkwardness of them both knowing that he told her he likes her. We were at a party one day and I thought I'd catch up with my ex since we both used to do cross country together and its been ages since I had spoken to her. It was fun, we had a good time, but little did I know my girlfriend was watching and she was fuming with jealousy. She said we were flirting and I asked her how and she said because our faces were close. Letting her know that it's impossible to speak from a distance with the music so high didn't help my case at all. My girlfriend also claims that my ex wanted to get with me and others that saw us agreed with it. Anyway, after ignoring and being grumpy with me for a few days, she calmed down and just said that I can't talk to her. I noticed an - ever so slight - similarity between the situations involving my girlfriend and her friend, and me and my ex. My girlfriend's friend seems to like her but she is still intent on being friends with him, and my ex seems to like me but I'd prefer to still be able to talk to her occasionally at parties since we have a lot in common. I let her stay friends with him, by being fair, shouldn't she let me stay friends with my ex?