You aren't fat. Objectively. Even if you were, you would still be okay. And beautiful. Yes, you can be fat and beautiful. You can be beautiful at any size. Really.
Don't make yourself smaller to make other people feel bigger. Take up all the space you need & do it loudly.
You don't have to be perfect to be worthy of love or being loved.
Your person is out there but you aren't going to meet him for a really, really, really long time. You need to work on yourself, anyways, because you've got a long way to go until you become the person you were meant to be. Guess what happens when you finally reach that point? Yup. He's worth the wait and the work. I promise.
If you only knew how little other people think about you, you wouldn't worry so much about them. Wear the pink, the sparkles, the crown, the unicorn onesie, all the things that make you happy. Let your heart sing.
Go to the doctor. And the dentist. Regularly.