Over 20 years ago I had a very short affair. DH and I worked it out (I thought at the time) and we stayed together and I think are very happy together now. But he is still struggling with it, brings it up in disagreements and at other times and recently has told me he has upsetting intrusive thoughts about it. I have tried to help him and have talked about everything he wants to talk about and he knows how sorry I am.
He will not go to therapy or anything like that. I think we should have gone at the time. What else can I do to help him? He has talked to ChatGPT which was some help, but you have to give it the right cues. I love him very much and feel so anxious and full of regrets. 