You are shy and timid, and possibly judgmental.
People with this body shape tend to be less extroverted than those with a rounder body shape. According to the National Institute on Aging’s analysis, they also tend to be more disciplined, organized and conscientious.
This body shape also changes they way others perceive your personality. According to a study sponsored by Glamour magazine [designed with guidance from Dr. Rebecca Puhl, director of research and weight stigma initiatives at Yale University’s Rudd Center for Food Policy and Obesity] thin women are perceived by both thin and heavy women as conceited about eight times more than heavy women. They are seen as self-centered four times more, and mean or controlling more than twice as often.
So if you’re thin and you realize that you’re not very nice to heavier people, you might want to change that. It can greatly affect how people see you, and sooner or later you might run out of friends because of your attitude.