I am 50, and last year I found out my partner - J - had been out with another woman. I was devastated. We spend every other week together as we both have children who go to their other parents. This particular weekend I was meant to go to his place on the Friday, however I texted him early in the day to say I wasn't feeling well and would be over on Saturday. He said are you sure, blah blah blah. Later that night I phoned him at home for a chat, no answer, so I texted him, no answer - which isn't like him. Texted again, then started to get worried so phoned his mobile no answer. Getting frantic now thinking he must have been in an accident. Half an hour later I get a text to say he is out for a drink, would be home soon. Phoned him again at home an hour later, he answered. Turned out he had met his daughters new boyfriends mother a few weeks earlier, she had said to the daughter that she would like to go out for a coffee or drink with J if he wanted to. J got the phone number from his daughter (16). He had originally texted her to go out during the week we weren't together but then texted her on this Friday to say was she free. They met at the pub, he found out within the first half hour he didn't fancy her, but then had to give her a ride home due to "car trouble", then she asked him in for pizza, but he declined. I drove over to his house, mostly to see if she was actually there, and threw all the jewellery and cards he had given me at him saying they didn't mean anything. I was so hurt and upset, the betrayal and deceit even though they didn't kiss or touch he says, and I do believe him on that. Anyway he says he wants a break, well I would have thought that it was obvious I wasn't going to be with him anymore by my actions. Now, my biggest regret is 2 weeks later I was missing him so much I texted him - just "Hi", but I regret making the first move. He phoned me back straight away, was very remorseful and apologetic and said he had been an idiot. Also admitted that if he had liked her he would have broken up with me. After much discussion and me telling him I had to think about it for a couple of weeks, we got back together. Its a year later and it still really hurts. I feel angry at him, angry at his daughter - who had texted him later "How was your date". He knows how I feel and understands. But how do I let it go? How do I stop feeling like a loser that he didn't love enough to be faithful to? How do I look at the daughter without feeling so hurt that she obviously doesn't like me? He has been very good since it happened, very open about where he is and who he is with, and trust is slowly building again. And now the daughter comes home and this woman is getting married again and the daughter is going to be a bridesmaid. Its all she can talk about, when I said how angry it makes me my partner says I should be happy for her, and he was the one who make the mistake, not her. Please tell me what you all think. Thanks