You sound like a very honest and upstanding man...irregardless of what you did, but I would as ellie suggested, find out why this happened. Was it alcohol? If so, quit drinking or be very careful how much you consume. I would not tell her, it would only make things worse. I say that because you are so remorseful about it and you do love your wife. Go see a counselor and spill your guts...get to the bottom of it. It would be a shame for two people who love each other to call it quits over this...and it happens quit frequently. I know someone who was so devasted over her husband's one night stand that they divorced over it...he was just as remorseful, but she could not get over it, hence the trust and hurt issue.
