The guy that said he has feelings for her is a different guy, not the one that was on the phone. The guy on the phone doesn't even live anywhere near her.That's how I see it too... I do think it is somewhat of a red flag, especially in that he is still bringing it up so much after days. But yeah, it would probably bother me too if I were him, especially since the guy said he had feelings for her.My opinion: something happened prior to this to make it where he doesn't trust you..for whatever reason. And you sitting on the phone with a guy friend while he was sitting there made him feel threatened or like you're "up to something". For some reason he feels that way.
I don't think she should have to give up her friends and he shouldn't make her choose, but that would bother most people really. He really does need to STFU about it now, after three days.
ETA: The whole thing with the ex confessing his feelings reminds me of why I have a "handle your own business" philosophy in relationships. I assume, kurls, that you TOLD your boyfriend about this ex's confession? I don't know WHY you would do that... if your intention was to make him jealous, you got more than you bargained for. To my mind, that was nothing he needed to know, and now you have to put up with him questioning every male friendship you have. All you needed to do was make it clear to the ex that you are in a relationship and it's not going to happen with him, and then adjust your relationship/contact with him accordingly. It has nothing to do with current BF. Wouldn't you think it was stupid if he told you a similar story about his ex? I sure would.