Excellent song 3B...one of my favorites at the moment.
You didn't backslide at all.....You handled your feelings in an excellent manner.
Dropping the rope can be as Blue said....just tossing your hands up and saying "I quit". That really isn't the DB way of dropping the rope though. That is more just quitting on the journey.
Now, IMHO, dropping the rope here is more like.....thinking like this.
I still love you (and always will in some little place), I appreciate our times together, and I wish you the best on your next adventures. I am not going to let our past control my present or future....However those times unfold for me.
Really "letting go" is done with acceptance of the present....not filled with anger, hate, etc....But more a loving good bye.