I completely agree with Montana...
One of the most important things in a successful relationship (be it marriage or not) is for each person to need the other to the same extent, or understand those needs (should they differ) extensively. With you and her there is a rift, it seems that you don't understand each other fully. She leaves you with many questions, and obviously her careless actions show that she doesn't completely know (or care, which is sad thing I'd rather not assume yet) of the depth of your frustrations over the subject.
You both need to understand each other, and you both need to be happy. If your very independent/togetherness values are clashing with no clear resolutions in sight, and if she continues stubbornly insisting on driving herself away from you... well, I wouldn't be very optimistic about this situation either. She seems to not care that she's toying with your emotions, and I guess the thing is: a marriage is a marriage because two people merge their lives together. One cannot continue to push away from the other whenever they feel like it, without understanding and being careful of the emotional risks and shifts. It's only considerate, to have some consideration of each other's needs, no matter what happens.
hmm...
I do wish good luck to you as well. You seem to be gaining a firm understanding of this, so I trust that you'll make a good decision over it