When H first came home I felt like I was walking on eggshells constantly...I felt like I had to think every syllable through so I would not say something to bring up the past...
This feeling goes away as does the nagging feeling you have inside about whether or not you did the right thing.
The more I saw my H come back to the man I married, the easier it got. I also went to C for two years and used her to vent my frustrations and feelings.
If I am upset and the past starts creeping up on me, I tell H and we sit and talk together. He understands that this is what I need to do. I try not to ask questions he can't answer and I use it more as a venting time to express my feelings. This has worked for us because my H now understands how I feel and how he can help to continue the growth of our marriage.