Thank you for quick & considered responses DnJ & Kind. I think you are both absolutely on the money. I feel very vulnerable & don't trust anything he is saying, even though it all sounds genuine. I am absolutely not ready to accept him back in my life at present and need to see more actions.
Kind - you're very astute! I do feel a pull to look after him & this was the previous dynamic in the relationship so I'm being mindful not to step into parent mode. I'm also balancing this with my ego, which is trying to jump for joy that I'm the chosen one! I absolutely know this is emotions, which is why I'm doing nothing just seeking advice on how to proceed slowly.
I've got good things planned over the weekend. A long walk with a friend and coffee & cake to follow, a night out with another friend and a coffee date with a different friend plus the usual walks and household stuff. Hoping all of this centres me again.