Even if you've covered your tracks, your man could discover your indiscretion. Assuming you still want to be with him, your best bet is to say how sorry you are, swear it'll never happen again, and beg for his forgiveness. Now is not the time to get into the reasons why you did it. "Wait a couple weeks before airing your grievances," says Weiner. "He needs time to process the betrayal without being confronted with the mistakes he's made."DON'T MISS: How to Get Over Him—for Real This Time