I'm struggling with all this at the moment. And trying to get me head round things. When H left 14 months ago, his reasons were all about the problems in our relationship. I discovered 2 months ago that he'd been having an affair when he left, despite swearing repeatedly no-one else was involved. But I understand how things had got so bad for him at home, we weren't communicating, I didn't respect him etc. In fact if he were to have posted how I treated him on MN he'd have had a chorus of LTB. But I didn't see how bad it was, he never told me how it made him feel, I never got a 'warning shot across the bows' and I was bad at listening and seeing the signs. I have always loved him but he didn't see it anymore. So, I blame myself for being who I was and not realising what was happening to us/him.
I just have to live with this regret and sadness and pain for the rest of my life (and I'm not saying that for dramatic effect).
What doesn't help is that he is now doing things for the OW he never did for me (but I suppose I didn't do much for him). Meals, nice weekends away, buying her stuff, little treats. Talking to her and putting his energies into her in a way he never did with me. He loves her and wants to be with her. I know he will never come back, but I just feel broken and devastated still. That our 20 years together were a failure because we didn't have the sort of relationship we should have. I didn't know it was so bad. I loved him and was happy to be with him.
I know I have to look forward, and put it behind me, chalk it up to experience and learn lessons for my next relationship. But I wanted to chance to fix this one but it's too late for that.
And I'm still not coping. No get-up-and-go, not sorting stuff out, house is a tip, work is a disaster. And I cannot cope with being in the house on my own without the DCs, and that's still after all this time. I can't find a new normal for the evenings when the DC are in bed, I don't know what to do, my whole life and routine from before is pointless now.
Sorry for this long post