Help I hate my body-too skinny?

Im 13 And Weigh 6st. Im Skinny. I Eat Loads Of Chocolate And Nothing Happens Lol. Dunno Where It Goes To. But Just Ignore Them. I'd Rather Be Skinny Than Mive. Just Keep Doing To Gym. It Will Help In The End. Im Sure You Look Beautiful. You Arent On Your Own In This. xxxxxx