Not to be rude, but you have mentioned cases of very selfish dumpers coming back. If they left you, screwed around, are they seriously worth it? Does having these hedonsitic experiences somehow make them whole and perfect again? "Oh, honey, I didn't know what I had until I lost it." "Well my dear, then are you not too smart!"
Come on!!!!!
Feelings of wanting to reconcile oftentimes DO go away completely, especially after you move on and find someone better than your ex. Someone that is committed and doesn't need to feel the warm insides of another to be so.