Why did Alex pick DAN to obsess on?
I don't see why she became obsessed with him. Living in a big city with tons and tons of good-looking men to pick from, I just don't see why she latched onto him in particular. He was attractive, but so are other men too. And after he said a couple of things to her that were nasty and insensitive, you'd think she'd want to just move on. I know she was insane, but still. Was she drawn to men who treated her badly? Was she angry at men she saw as "spoiled rotten" and it made her mad thinking he had an easy life and she thought he was over-privileged, and therefore wanted to make his life hard?