My husband has cheated (albeit only via the computer and phone), and let me tell you, the pain he inflicted cut me to my very soul. You quickly realize how trust is the thing which holds a relationship together, because as soon as the trust is taken away, the relationship falls apart. In my situation, my husband went looking for fantasy to escape the presssures, stress and frustration of every day life, and to run away from issues in his past that he was incapable of dealing with. He is just now realizing that his actions were just the symptoms of a bunch of whole other issues, and is working very hard to fix what is "broken" within himself.

My advice to you is to look at what you think is missing in your own life. Your attraction to other women, and your temptation to cheat may be signs of something else, like depression or anxiety. And most likely it has nothing to do with your relationship with your wife at all, but everything to do with how you feel about yourself.

I wish you luck in with your internal struggle.