When I was about 7, I came home from school crying again.
The other kids (boys, usually) were mean to me again.
My mom came into my room, rubbed my back and said "Honey, as long as you are chubby, the other kids will make fun of you. You are going to have to develop a thicker skin, and not let it bother you."
In other words: I can't control them, but I can control how I react to them.
That control has made all the difference.