So, I split with my boyfriend. It was mutual. Sort of. Well, he kept saying he wanted to move back home to be nearer his friends and family. I realised that he was looking for a way out. I suggested we split. He agreed. We'd been seeing each other for just less than a year. We weren't living together, but serious and committed. A lot of promises were made. I'm 44. He's 38. I have a DC. He doesn't. I think I tried to "get in there first". I was really sad he didn't fight for us.
Anyway, he wanted to stay friends. He's gone off to a festival for ten days. He's a volunteer. I'm looking after his cats. He went home one weekend a few weeks before we split and I saw he'd made a new FB friend. I didn't think too much of it at the time. With some FB digging, I can see that she is with him at the festival and telling everyone she's in love on FB, tagging him in everything. I think there was an overlap. I'm sure of it. Should I tell her? I think he slept with her when he was with me. And he's slept with me since we split and was presumably with her. I've confronted him and he's denying it all.