Why do you need to do anything? Right now you have zero expectations and things are going great. I predict the minute you 'expect' something to happen by trying to 'do' something, things will get worse.
Why not just go with the flow. Do 'friend' things together, like you would do with a guy friend. See what happens. If you feel those old 'feelings' returning then you can inch up to the next level to see if she is feeling them too.
From your words it appears the 'baggage' from the past will not be the problem - it will be the fear (both of you) of getting involved only to be burned again. So trust and respect must be built before you reach the level of love or sex.
Good job though. If my STBXW even smiles at me, I think it is a victory of sorts. A kiss on the cheek and discussing personal things? I can only wish!
