...don't do it...don't do it...don't do it...don't do it...
Oh well. Look, the cheater that's always a cheater ISN'T every guy who ever cheated. The cheater guy we all should worry about is the one who cheats with impunity an regularity and has absolutely no remorse about it. You know who you are.
Painting with too broad a brush is like saying that every guy who ever lied is a liar and will never tell the truth.
No one in here has enough information to make that kind of judgement. Nor is it helpful, the OP came in here asking what he should do about his instance of cheating while fully admitting it was his fault and that it was wrong.
Telling him that he's just a cheater who's destined to cheat because that's what cheaters do, is less than helpful to anyone - and while I'm sure it gave all you paragons of alabaster moral rectitude great satisfaction to damn the infidel, I'm going to call everyone who's said that a liar if he claims he never lied to his partner, or kept secrets, or done any number of things - and yes even cheat.
Total honesty means what? Do you tell your partner that he looks like a fool in that shirt he loves to wear? Do you tell him things that you know will be hurtful simply because?
Or do you evaluate the situation and try to strike a balance between total honestly and needless damage?
If the OP cheated - and it would help to know more (because I agree that unless you've got a real pattern cheater on your hands the cheating is usually a symptom of something else,) he's sorry he did it, he's not going to do it again; no he's not destined to fuck someone else like he caught a cheater virus the first time
What possible reason could there be to bring it up?
...but but but you have to be honest or you'll burn in the hell-fires of ultimate cheaterdom and your relationship will wither like the vine in winter...
No.
Yes relationships need honesty, but the kind of honesty that is only going to do damage -
and end the relationship people are insisting will fail if he doesn't tell.
Is not in the best interest of either of them.
To the OP, if you're not going to do it again, bury it and move on.
If you start to be cheater guy, then you tell him and let him decide.