text: how do i get rid of my low self-esteem? it does help that my little brother calls me fat all the time because he is a toothpick! it's natural for girls to have more fat than boys, he's just trying to get under your skin.  low-self esteem is something you have to find within yourself.  if you believe in yourself, you won't be as affected by what other people say about you. cause trust me other people will lie about you.