I am a girl, 13 years old, and I hope someone can solve my troubles.

You believe that exercise can change a person, but stick to it. I worked hard when I was a child, and it's hard now. Of course, this is not to stop you from learning, but to let you know that people have many choices. Besides, you're not old enough. Try to enrich yourself. In addition, you must be happy when you are young, and you will have a lot of troubles when you grow up, just like me. I still want to have fun, study hard, take part in more activities, keep my heart, and most importantly, laugh from my heart. I'm grown up now.