My boyfriend started messaging a female colleague outside of work a while ago. I didn’t think anything of it at first but the messages became more frequent, he started adopting the same likes/hobbies as her that he’s never shown an interest in before, he randomly made a ‘close friends’ insta story and added her to it even though they’ve only known each other a few months and don’t even work in the same office. Fast forward a while and he decides to take a new job and becomes very emotional about leaving his current one and tells me it’s because he’ll miss the friends he’s made. After a bit of prompting he fesses up that it’s really just this girl that he will miss! He said they instantly clicked and he’s never really felt that with a friend before. I question if it’s anything romantic and he says no. I asked if he was single would he be interested in her and he said yes probably. He then says that maybe he’s found this connection because our relationship isn’t 100% happy and maybe if it was then he wouldn’t have had that with her! We agree to try and get things better between us and I hope that that means he’ll stop messaging her or at the least when he starts this new job in a new city there will be no reason to message her. But no, he’s still messaging her multiple times a week even though I’ve told him I don’t like it and it makes me feel insecure. He says he doesn’t think he should have to cut off the friendship, which of course I don’t want to tell him to do that, but I just don’t understand why he doesn’t want to if he knows it’s hurting me and he says he doesn’t think they’ll ever meet up.. so what is the point in keeping up a friendship online? It’s now also got to the point that he knows it upsets me so he will never message in front of me but that just makes me feel worse. I can’t stop thinking about it literally daily and get so upset/angry if I ever catch him messaging her. Am I being a too crazy and jealous or is this a bit weird? What would you do?