I am a 12-year-old girl like you, and I don't like running very much. If you don't like walking around, you can jump rope. You can jump 100 in the morning, 200 at noon and 200 at night. If you are studying, you can jump 500 minutes after dinner. You can jump 1000 if you insist. And, as they say, drink more water. You can have soup before eating. You don't want to eat less, but after eating soup, you can eat as much as you want, but you will eat less than before. Because you are full, physical education class should exercise more, keep a heart to lose weight and don't give up. At this time, you can also run twice. As long as you stick to it, you may lose weight. Then you can also see what others say and how they lose weight.