A year ago I sleep with someone when my partner and I broke up, we broke up due to finding texts from another women which were hidden and broke up for a month. Fast fwd a year later we are together and so happy. Problem is I never told him what happened when we broke up, he never asked so I didn't tell but I am starting to feel incredibly guilty and I don't know how to deal with it. Its been well over a year now since this happened but I cant help but constantly cant stop thinking about it. Any advice would be great? I don't know if I'm overthinking it all. Please no negative.