Hi Aud, I just found your thread. Do you have a prior one explaining the history of your sitch?
I was here in Infidelity land for almost a year, I have now moved to piecing but have the same concerns as you.
I think Twist hit the nail on the head that you(and I) have to let go of the fear. Learning to trust again is a big risk to take. If you are like me, I think if I try to forget about the A and move forward H will down the line betray me again.
Sorry for the hijack, just wanted to let you know that your feelings are understandable and you are not alone.