I'd just like to say that "dropping the rope" and giving up are not synonomous. "Dropping the rope", "letting go", "setting them free" ... whatever wording you use ... does not have to mean giving up. It means go live your life, let them live theirs.
The difference between moving forward and moving on seems to be the involvement of another person on the LBS's part. Getting into a relationship or even seeking one out because of something your WAS has done or isn't doing, does not bode well. It's reactive. Make your decisions based on what is true to YOU.
My advice would be to not go seeking alternate romantic relationships until you are doing so for the right reasons ... not to fill the void left by your spouse, not to replace the attention and affection you wish you were getting from your spouse. There wasn't room in your marriage for three people and I would suggest that won't be room for three people in your next relationship either.
Drop the rope. It's healthy and necessary. For YOU. Live your life and become the best and most authentic you can be.
Merry Christmas to all! Peace, PEI
Holding onto anger to punish someone else, is like lighting yourself on fire to get smoke in their eyes ~ 25yearsmlc