It sounds like the backside of you brain is smarter than the front side Quiet. Something is or was incomplete.
IS rather than was would explain the continued thoughts. ;-) Quit trying to be all cool and one o'de guys and put some thought to the subject and go from there.
So long as you keep that going on, you'll not be happy with any other woman. Listening to some of the cretins on THIS board would get you a flat zero. Just like they have.

It might just be that you need to complete something from that relationship in order to go on. Or to fully satisfy your inner mind that breaking it off was the absoLUTE right thing to do.