I still think about the bad things and I still cringe when I see her reading her e-mail.
I know this feeling only too well. Two years after NG 'ended' the a by copying me on an email to ow, I still felt apprehensive when he was on his computer, and especially if he flipped screens when I walked by. It is a few months from then, and all I can say is that it was a phase I had to go through. The piecing thing is as much a process as getting to reconciliation was.
For me, letting go of what NG did on his computer came about only when I could accept that he has a right to his privacy, and that I needed to manage my emotional need for reassurance some other way than by making him feel uncomfortable for wanting some privacy. It was not easy, but after a few months of stability, it is becoming manageable.