How can I lose 10 inches off my waist (belly on) by June?

I a 12 years old "4'11"-"5'0" and I measure 32-28-35 but the thing I REALLY hate is my belly on measurement which is (DUN DUN DUN) 32 INCHES. I absolutely HATE my body, I mean, I eat SO healthy and exercise JUST as much (well, maybe a little less) than my friends who eat TWICE as much as me, yet I am TWICE AS LARGE... oh, wait, no I'm not! JUST MY GIGANTIC STOMACH. I can't fit into ANYTHING except sweatpants and I am a total eyesore. PLEASE help me.