Thanks for all the advice and support. I'm determined not to overthink this. Who knows? I can't chase, it has never worked before. I'm just chilling with S at the end of the day. I have learnt I can't do anything to change her so I can only try to look after myself and S. I imagine it is too early for any major change. It has only been four months and her infatuation has been going a lot longer than that. We'll see what happens but I don't want to get too optimistic.