I feel like a one-woman spokesperson for Shirley Glass (renowned specialist on infidelity) - this interview has some great information about As - the pain, guilt, and most important, healing. This excerpt, I imagine, would be particularly helpful in your situation:
Quote:

Q: Do affairs ever serve a positive function--not to excuse any of the damage they do?
Dr. G. Affairs are often a chance for people to try out new behaviors, to dress in a different costume, to stretch and grow and assume a different role. In a long-term relationship, we often get frozen in our roles. When young couples begin at a certain level of success and go on to achieve all kinds of things, the new person sees them as they’ve become, while the old person sees them as they were.

The unfortunate thing is that the way a person is different in the affair would, if incorporated into the marriage, probably make their spouse ecstatic. But they believe they’re stuck; they don’t know how to create that opportunity for change within the marriage. A woman who was sexually inhibited in marriage--perhaps she married young and had no prior partners--may find her sexuality in an affair, but her husband would probably be delighted to encounter that new self.

Q: How do you handle this?
Dr. G. After an affair, I do not ask the question you would expect. The spouse always wants to know about “him or her”. “What did you see in her that you didn’t see in me?” Or, “what did you like about him better?” One man asked, “was it that he had a bigger penis?”

I always ask about “you”: “What did you like about yourself in that other relationship?"

How were you different? And, of the way that you were in that other relationship, what would you like to bring back so that you can be the person you want to be in your primary relationship? How can we foster that part of you in this relationship?

Q: That’s a surprising question. How did you come to know that’s the question to ask?
Dr. G. There is an attraction in the affair, and I try to understand what it is. Part of it is the romantic projection: I like the way I look when I see myself in the other person’s eyes. There is positive mirroring. An affair holds up a vanity mirror, the kind with all the little bulbs around it; it gives a nice rosy glow to the way you see yourself. By contrast, the marriage offers a make-up mirror; it magnifies all your wrinkles and pores, every little flaw. When someone loves you despite the fact that they can see all your flaws, that is a reality-based love.

In the stories of what happened during the affair, people seem to take on a different persona, and one of the things they liked best about being in that relationship was the person they had become. The man who wasn’t sensitive or expressive is now in a relationship where he is expressing his feelings and is supportive.

Q: Can those things be duplicated in the marriage?
Dr. G. That’s one of the goals, not to turn the betrayed spouse into the affair partner, but to free the unfaithful spouse to express all the parts of himself he was able to experience in the affair.

I see a lot of men who are married to very competent women and having affairs with very weak women. They feel: “this person needs me.” They put on their red cape and do a lot of rescuing. They feel very good about themselves. That makes me sad, because I know that even though their partner may be extremely competent, she wants to be stroked too. She wants a knight in shining armor. Perhaps she hasn’t known how to ask for it, or the ways she’s asked have pushed him away.


Here is the link to the full interview, which is wonderfully enlightening:

http://www.shirleyglass.com/psychologytoday.htm

Good luck!
Jennifer


shameless plug for my NEWEST thread