Extreeeeemmmmeeelllllyyyyy obese?

Hi I'm Esther and I am 4'9" and around 200 pounds. Ik I'm humongous but it's because food looks at me all day long. I need to loose weight or something but I don't know how. I really want to be skinny like my friend Chamille, but it gives me depression thinking I'll never be that pretty. I'm scared to go to school because everyone harassed me and I feel lost and alone and I need change fast