I am in the position of having trust issues, H and I are S and I am having a hard time with the idea of reuniting under the same roof. Here's part of my thinking which I share because it may be what your W is going through... since we are S, and we have a chance to make a "new" decision, (in other words, if we could do it over, would I make the same decision?)
The problem with this thinking is that the decision to be committed has already been made. S are meant to be shortterm and allow room for problems to be worked out without a D. There are no do-overs.
If your W is telling you that she doesn't want to get into the "old " feelings -then forget it - she still feels for you what was there before so things can be worked out. Just my opinion. You have been very patient and will have all our support here for whatever decision you make.
I would suggest that if you want her, go after her. Don't hold back as long as you can be sure that it won't set you back. But it is just an opinion.