More than just a simple Cinderella story, my friend Kent and I always believed there was a deeper, more esoteric theme running through Donna's Once Upon a Time—namely, that this was a story of past-life loves reuniting after being separated at death.
This song in particular reinforced that belief, because Cinderella had never known her prince before actually meeting him at the ball. "Having learned to live with you, it's hard to live without you. You always said if I were down, to cheer me you would be around."
Then again, it could just be Cinderella's longing for her dead father…