Maybetime:
I think you and I share alot; both is our situations and outlook. It's difficult to hang on and difficult to let go so again we find ourselves searching for what is right, fair and/or the high road to travel.

If it's any comfort to you, I think that re-marrying argument (or even dating a new person) comes with a certain amount of newness that begets chemistry. The question is how long will that chemistry last with the "new" person? Perhaps they will have even a shorter "honeymoon" period than we (the "old" relationship) experienced. Everyone is different, but its clear that some (my W, your F) may get more excitement than we do at this initial stages in the R, but their excitement may not have the staying power (eg, The Tortoise & Hare analogy).

I am learning to look at the overall picture in the relationship as the barometer rather than individual events (unless indiv event is cheating). The bottom line is figuring out how long to keep trying and when to cut bait. I am struggling with this as well.