I was with X for a year and a half, but I broke up with him for Y. I had relations with Y, realized he was not my type, and broke up with Y. Then I went back to X, told him I had relations with Y and X took me back happily, saying that he would never bring up what I did with Y. It has been a month since he took me back, and he brings up what I did with Y every. single. day. He's made me apologize hundreds of times and even made me admit that what I did was cheating. I don't think it was cheating at all because I was not with X at the time. What do you think?