personally, i think discussing this with your wife is bad advice. if you really need to work on things then just have a sit-down and go to marriage counseling. no good can come about of you telling her about your "feelings" for another woman i dont know if the people who are advising you to do this are married or just have girlfriends, but as a married man i advise against it. as with most things in life, it does make a difference if you have experience or are merely hypothesising.. once you tell her you CANT go back. if you decide to tell her later then you'll still have that option. heck, you can even be proud about how you didn't do anything and just walked away (presuming you do).
i see many people in here telling you to discuss this with her, which i highly advise against. I say just get over it and work on your marriage if it needs it. let's see what other people think, anonymously, based on their status.
ps if you think that his wife will be happy that he shared this information with her you have a LOT to learn about women.