If you are done then you are done and there is not a thing wrong with that. We all have our limits.
I guess I just wonder (for the sake of conversation) how anybody could possible know what will "never" happen? It may or may not work out and certainly one person can only do so much.
I know you want to feel better and I am so very, very glad if you do. I guess, if I may be so bold, it seems like you are still trying to convince yourself of this.
I said to my C the other day that right now I believe in marriage more than I ever did! That is not to say I believe in my marriage but generally speaking I just understand things better now. Maybe you are at that point as well?