The toughest part of being in limbo is controlling your mind and detachment. Every time she's late, texting, buying new underwear your mind is going to think the worst. The best thing to do is keep yourself busy so you don't realize she is doing these things.
As for the back rubs, I would back off until she makes a gesture towards you. Since you have taken the pressure off she is more willing to receive these gestures from you but for a true reconciliation she has to be willing to extend the favors.
