So, I've been seeing someone for a few months who texts with his ex quite a lot. They were together for 12 years (no kids) split up four years ago, but she got back in contact shortly after we started dating. I don't mind him being friends with an ex at all BUT he's been to meet up with her without telling me (as in we spent the night together after they'd had lunch that day, and he talked about his day and omitted to mention that, I found out months later), and hasn't told her that I exist. It is the latter that is bothering me. He says "we just don't talk about that stuff"... If I raise it, he tells me that I have trust issues. Am I being untrusting, or unreasonable to expect him to tell this "friend" of his, who is "like family to him" that he has a partner? I know that his ex wife had a real issue with his first love ex being in his life and in the end it broke them up (which reached boiling point when they all went out to dinner and the two women had a huge fight)... and he's asked me if I'd like to go out to dinner with X and him, as if they are the couple and I'm the guest. I decided not to subject myself to that little ego bump for him; two women hustling for first position. He tells the same boring stories about her on a loop, to the point where I have had to tell him to stop, so now he tells them with her name omitted. Do some men just need the validation of an ex in the background? Am I being untrusting or unreasonable?