Thanks for the update ItHurts. You know I agree with your rationale here. I could see some version of what Steve said in some circumstances. For example, if she at some point asked why you've been less responsive you could say something like "After spending some time with you I know I still have a special place in my heart for you and I can even picture the two of us together. I'm not sure if that's truly possible for me or not because, like you, I would never want to return to the relationship we had before. But either way it was enough for me to discover that while it was nice to reconnect and catch up, a friendship alone with you won't really work for me."
The key would be that you're not saying you're all in, just that you were open to exploring things. Because I think that's true. Frankly if I were you I wouldn't jump back into bed with her, I'd need to be given a reason to think her "I do" would mean more this time than the last time, because who needs to go through a repeat?!?
Me:38 XW:38 T:11 years M:8 years Kids: S14, D11, D7 BD/Move out day: 6/17/14, D final Dec 15