Do you want him to know? If so, just tell him. If you don't want him to know, tell him that you never would, and do something for him to "prove your love," like give him a blow job or something.
why did you guyz break up inthe first place? i mean if he didnt know that you cheated on him. im sure he cheated on you and felt guilty so he turned intoa big asshole so u broke up.if that was the case then thats ok i dont know what i just said but thats ok. im trippin.
There is a thing called "projection"- maybe he is accusing YOU of cheating because HE's the one who's been cheating and getting away with it without you knowing, and wonders what YOU'VE been doing and getting away with... "An honest man is the easiest one to cheat"