Its huge that you have acknowledged how you could have been better. Im not sure if you should tell her either. I think that it might freak her out. Are you still in the D process? Maybe you should just tell her that you arent as ready for it as you thought. Could you ask her maybe just how she feels bout the D still?
A big breakthrough that I had with my H was when we were discussing separating car insurance. I told him that the thought of us becoming even more seperate just made me sad. He agreed and it opened up a big dialogue for us.
I guess I gave the wrong finger to the wrong man...