Jimmy Stewart in "Vertigo" and Dark Obsessive Karma

She set you up,Jimmy, she misled you, she used you, she broke your heart -- and you want to return to the scene of the crime? And what's with all of this following her around? Sure, you're an investigator, but your investigation takes on the creepy feeling of a stalker. Is your dark obsessiveness the "vertigo" of "falling" in love?