Everyone is different from others all over the world. We all have different advantage and shortcomings. But you should believe that you are the best, you are yourself.
You can smile against the mirror when you get up every morning and you will be have a nice day. When something makes you sad, you can talk with others, such as your friends, your parents. You can also run on the playground. And you will be better than before.
Do something you love. It can bring you happiness and a sense of success. You will more believe yourself. Don’t mind others says. Just do you want to do. And when you happy, your friends will happy, too. Believe yourself. Because you are the best, you are the only one in the world.