To tell the truth, I have heard many versions of that song, and every time it strikes me as a 'spite song' (look who you could have been with now if you had only held on). Yes, it is sad too, he still miss her; but is that a valid excuse for it?
Is your comment addressed to me and The Contours' song? Yeah, I listened a little clocer- - the song is sort of bitter but it sounds so happy and upbeat! :)