Keep it to yourself or tell your OH

If you're in a committed monogamous relationship and you f8kc up and cheat, not telling your partner is not a kindness, its a cop out. The only one it serves to protect is the cheater. If you're willing to cheat, you're willing to ruin the relationship.

Tell them and let them do with that what they will. At least give them the respect to make their own decisions. Some may forgive and move on some may not. When you cheated you took that risk, now live with it.

Interesting question. Personally I don’t get why it’s such a big deal either. I have been cheated on in the past and whilst I was annoyed about it it certainly wasn’t a life changing event. I think it’s a bit naive to think that you will never be cheated on, but I guess it’s different for others.

Kind of depends though. Sometimes leaving is not really an option for the person who was cheated on. If you're talking about a zero responsibility relationship with no real ties, then I'm with you. But if you're talking about two people with very young kids, a sole earner in the house, two mortgages and a dog to feed sometimes (unfortunately) dropping that bombshell can only ruin their lives a bit more.

The question is way too basic. It's impossible to answer without specific context, story, history, and details of the affair. I mean straight away are we talking about a Christmas party kiss on the same night they lost their job and shat themselves from drinking too much, or are we talking about a 6 month romance with weeks away on "work trips".