You can't have your cake and eat it. Occasionally, there will always be feelings, but in most cases you don't want to go back.

On the other hand, you look very sensitive, don't you? I don't think I can let go of this relationship.

If you want to know, just know it euphemistically. Maybe it's as you wish: he still wants to come back to you! Give it a try!

Bless you!