Shirley Jackson said this quote

On either side of Natalie as she walked toward her own room were doors: perhaps behind one door a girl was studying, behind another a girl was crying, behind a third a girl was turning uneasily in her sleep. Behind a certain definite door downstairs Anne and Vicki sat, laughing and speaking in loud voices whatever they chose to say; behind other doors girls lifted their heads at Natalie's footsteps, turned, wondered, and went back to their work. I wish I were the only person in all the world, Natalie thought, with a poignant longing, thinking then that perhaps she was, after all.