"I wish I was anorexic" = "I wish I had control over my disorder/life/food"
"I wish I was bulimic" = "I wish I could eat food i enjoy again without the fear of weight gain"
when you're fat, i feel like every little mistake comes across as lazy or greedy, unfinished nails, wearing loungewear, having messy hair, all things that would be considered chic on a thin girl is seen as monstrous on the fat girl, everything i do is overshadowed by my weight