If you go to school, you must pay attention to nutrition, but don't eat too many snacks if you have enough nutrition. I also have 140 kg and 165cm in junior high school and senior high school. The pressure is getting bigger every day, I eat more, my stomach is bulging every day, I like to eat all the sweets, and I can't lose weight! I ate less when I went to college, because what attracted me was not so monotonous. I think it's necessary to give up snacks and lose weight. Don't go on a diet when eating. Once the meal time is over, don't eat any more. It's important to insist on eating fruit and spend more time on things that interest you. I think it seems a good choice to use chewing gum instead of snacks!