No. And I am being honest. I will also say that you want to be the best 13 year old you can be and take care of your body. It's going to be going through a lot of changes
Start walking everyday and eating lots of fresh veggies and fruits. Try to stay away from things- you know like cakes and cookies and stuff.
You're going to sprout up and get taller and thin out. Being active and eating well now will really make you feel great about yourself. I know when I was 13... I was outside all the time. I did anything I could to find other active kids.
So my advice, don't worry about what anyone says, be you, love you, and get active and eat healthy. You'll thank yourself forever!