Pat,
I feel the same way with my wife. I had so much unconditional trust with her forever, that I find it almost impossible to let it go.
From all the stories on this board(and mine), we all had wives that were morally sound and beyond trustworthy. Now, the reality is that they are human and are weak like the rest of us.
I think Sandi said, believe NOTHING of what they say, and only 50% of what you see. You still have feelings for her, so you are carrying the load. At some point, you will let it go(drop the rope). I for one, have the same feelings as you.
I think the advice would be keep doing what you are doing, sounds like it is working. You will have to set a boundary and complete disclosure if you reconcile.
Keep up the good work. Stay strong, keep pryaing and affirming.