MI, I know how you feel on that. Dropping the rope is definitely hard to do or think about and an internal timeline is really a gut kind of decision. Like you I have told the W that I cannot remain in limbo forever and she has acknowledged that.
PD, I hear what you are saying and honestly if I give her the timeline or not when that time is reached if she is not willing to start working on us then I will take the next step and she is aware of that. I have been in fear of losing her for pretty much our entire marriage but now I'm really not. Working on myself and my self-esteem has given me a new outlook and made me realize that I shouldn't fear that. I will be fine and can be happy if things don't work out. I really hope they do as I still love her but sometimes things just aren't meant to be.