Think positive, and you'll see more positive results. The fact that you're living together, holding hands, and attending theraphy is a plus. I hope your therapist is a SBT though. If not, please e-mail Michele's office for a referral.
When one spouse is thinking of divorce, its best not to pursue, nag, argue, or mention the ILUs. Basically, non-relationship issues is best. "Following her lead" means to allow your W to set the pace. If she wants to reunite, or suggests a particular outing, "go with the flow". Remember, there is a cause and effect to our actions. If you make demands, it will send her farther away. Remain composed, and allow her to sort things through. Right now, your aim is to implement the GAL, and 180s. The benefits will pay off.