It's very common for a WAS to pull back after a positive exchange with the LBS. This will happen for quite some time. That is why its essential for you to detach and take each moment for what it is. A nice moment. Not only must YOU detach, you must refrain from attaching *any* expectations based on one good date, call or moment.

Your H might never decide to change. Or, he might be changing but its just not the change you want. Either way you don't have control over what he may or may not be doing.

Its difficult but also reality. A big part of your struggle can be altered by you and your ability to detach and eradicate any and all expectations you may have about the future of the R.