Help.! I'm only 13 and I have cellulite.!?

I'm only 13 and I have cellulite on the back of my thighs! Please tell me what I can do to get rid of it? Will running help an also thigh workouts and dropping a few pounds cuz I am a bit chubby :( will drinking lots of water help.? It's not MAJOR but it's still there. It's really embarrassing for someone my age please help.!