Actually, I would argue that the sex, breakfast and hanging out have given her pause - hence her hedging about maybe continuing to live together.
If this behavior is different from your previous behavior it can be a good thing. If previous you was aloof, then being more present is a 180. She seems to be protesting too much right now.
Sometimes, in a situation like this, a simple “I don’t want a divorce but I won’t stand in your way if that’s what you want” will suffice. If she asks you why you want the marriage, you can say “Because we loved each other once and I believe we could again”.
BUT - all that presupposes that you WANT to stay married to her. If you’ve realized you’re better off without her, then the approach is different.
