Wow Sara. I know that is hard. I think you are very strong....I am not sure I could be so strong. Rob is right in saying you should think of him as a guy you just met when it comes to reconcilling.
You don't have to completely close the door, but you deserve so much better than you were getting.
You sound so good. So much better than a couple of months ago, I hope you can see how strong you have become.