My bf is in his 50s he is friends with a number of ex girlfriends - in fact I think most of his female friendships are former ex's. When I met him at a wedding 7 months ago he had been single for 6 weeks after a 9 month relationship (I honestly thought he said 6 months but there you go). He didn't seem to have much to do with his last ex until around Christmas when he told me he had met up with her and she was now a friend. Now they seem to have an occasional coffee, one earlier this month, but they definitely message etc. I have become a bit fixated on her. He posted quite a few pictures with her on Instagram and they seemed to be off on trips and holidays and for some reason I am starting to compare the relationship ( which ended because he said he wasn't emotionally available and it fizzled out). I trust him, but I just feel it's an unnecessary friendship to be honest, if they had finished years ago I really wouldn't have a problem. I tend to over think and tie myself in knots about things, any thoughts?