To self-obsess over everything you have said or done in your past that could have contributed to an outcome not in your favor and to carry the belief that things would be different had something of little importance been altered.
"You need to stop microanalzying your relationship. He left you 'cause he doesn't love you and knew he never would. There's nothing you could say or do to prevent that."
"Don't microanalyze the past. Trust in yourself and know that people take you in whole for who you are."
This is what happens when a man with some facial scruff lets himself go by eating too much pizza and drinking too much beer after he gets too comfortable with his pretty girlfriend. Eventually he will think he can upgrade from his current lady and leave her, or she will dump his ass and he will still be left with a double chin that even the scruff can't disguise anymore. He will be a victim of "double-chin karma."
"Damn, Evan's gotten fat since he dumped his pretty girlfriend. He took her for granted and now he's got double-chin karma coming his way."