T2, I have to agree w/you. She needs to do this in order to see what life will be like or she will always wonder what might have been. I'm not surprised that she is waffling. She's unsure of what this may be like and yes, the possibility of separating/divorcing.
I think you have been handling the situation very well. Sounds like you've got a lot of plans activities that you want to implement. I will say this, if she does move out for a couple of months, you are going to notice a heavy weight has been lifted off your shoulders in the way of stress and egg shell walking. Yes, that's right...even though you've been doing wonderfully, there has been a certain amount of stress on you. Enjoy your new found freedom and definitely take some time for yourself. You've earned it.
Enjoy your weekend.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.