My best friend is losing too much weight?

I Can Kinda Relate To How She Feels Because Being Big Isn't Easy And Sometimes The World Pressures You Into Looking A Certain Way. Just Really Get Serious One Day And Tell Her That Your There For Her And That She Can Tell You Whats Happening And That You Wont Judge Her. If That Doesn't Work Then You Should Talk With Her Parents Or Any Other Adult That Can Help.