@DeathStare
You know I’m not OP’s SO, right? You know I’m not simultaneously being safely aloof AND having dinner with with someone who has sent me topless photos, right?
I’m not pretending anything, and I’m not being dishonest. I’m saying I prefer to keep my online life online, and my real life real, and have found than minimal overlap works best for me.
I’m also saying that I can totally see myself doing what the OP has reported her SO has done, without there being any sinister ulterior motive.
As for keeping his relationship meaning he doesn’t get to meet his friends, well, ultimatums happen. Assuming he is actually going to meet them - as friends - I’m not sure that any relationship is worth preserving if one partner is going to dictate who the other can and can’t meet.
Also, I’m not defending the guy. I’ve mostly been defending myself here, but lots of what the OP has reported he’s done isn’t unreasonable IMO. That said, since this has become an issue with a countdown (meeting in real life), it would be good if - assuming he is on the level - for him to make clear to the female friend that he is in a relationship, has been for some time, and ideally he should do it with the OP watching the conversation.
But only if this would satisfy her and she didn’t feel that it entitles her to have authority over his interpersonal relationships in the future.