For now, don't behave as if you just assume anything has changed. On the other hand, don't swing too far the other way and act cold or silent. If the two of you can laugh and enjoy one another's company, then do what works. If she seems a bit withdrawn, give her some space. If she gets cozy with you, then respond likewise........if that's what you want.
Frankly Oz, I'm little confused and don't know what you really want. I can't tell if you are trying to say what you think we expect from you, or if you are trying to convince yourself that you want out of the M. Unless there is more than you've told, I can't figure out where you are trying to go. Do you want to stay M to your W?
Here's the thing, when you are just trying to play a role someone has suggested but you can't really capture the character in your own head, then you are going to struggle knowing what to do with the next move. So that's why I asked what do YOU want? Not what does your W want. Not what does the forum say. What does Oz want?
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!