Being stick skinny to the extent where you can see your bones through your skin is not a good look. You don't need to be that to be beautiful or to be perfect or to fit in. Who you are is exactly who you should be. You can't let other people dictate your life or how you feel about yourself because then you're not living.
When I was a kid you didn't have Twitter or Instagram where as soon as you walk out of a building a photo of you is up within two minutes or a million people are commenting and saying nasty things, i found a different confidence because I realized that you can't base your self-worth on the opinions of others.