Only bad things happened to people around her, she didn't want to risk anybody else's life for her own happiness. She believed that the only way for people not to suffer around her was if she isolated herself, meaning that she would live on alone and miserable for the rest of her life. Her plans changed when a persistant guy, involved in a bad line of business couldn't get enough of her and wanted to know her deepest, darkest secrets. He was just as poisonous to her as she believed she was to him.
(Jimmy will not be alive in this story unfortunately.)