Hi Hope. My story is on another thread (infidelity, long) and as a newcomer to this forum, I don't know your story (is there a way to find the relevant thread, incidentally?).
I too have found huge comfort from other people's experiences, because like others (and like you, by the sounds of things) my DH's infidelity was completely out of the blue and totally at odds with his character. We are 5 months on and I am at last starting to feel joy in some things. We have a wonderful relationship now and although I wouldn't ever want to have gone through what we did, I know our relationship is infinitely better and stronger for this experience.
Although my DH was faithful before, he was incredibly complacent, lazy, selfish and emotionally retarded to be honest, in that he had an intense dislike for discussing our relationship. It was a major step for him to have counselling, but at that point he would have done anything, if it meant that we could stay together. In fact, the counselling helped him enormously - and not just with the issues that led to his affair.
He learned huge amounts about how his childhood had shaped him and he is now transformed into an emotionally honest and open man. He always was incredibly kind and affectionate - and I had never doubted his intense love for me - but now, he will talk openly about his feelings. That is a major gain from this horrific situation. Add to that, a complete absence of complacency, laziness and selfishness and you can see that sometimes, good can come out of what for many of us, was the worst thing ever to have happened to us.
I have no illusions though, that there are further dark days ahead. I hate seeing any images from last summer or hearing music that was in the charts then - I feel very low at those points and I also still get terrible flashbacks from when I found text messages on his old 'phone, which was the catalyst for my world to come crashing down. I also still feel anger at times, but this does seem to be lessening.
The key to us getting through this was his honesty, his complete remorse, his willingness to get professional help and the completely positive changes in his behaviour. Also, it is blindingly obvious how much he loves me - and how much I love him, too.
If I were ever advising anyone in a similar position, I guess I would insist on the errant partner doing the things my DH has done. Thinking of you and offering you total support - please don't think that I believe I'm out of the woods yet though; I know I'm not.