1. Eating more high-fiber vegetables in three meals will make you less hungry.

2, eat three meals, don't eat only two meals or one meal a day, especially don't eat breakfast, because people who eat only two meals or one meal a day, the interval between two meals is too long, it is easy to increase hunger.

3. The eating speed of each meal is slowed down, and eating for 30 minutes can increase satiety. But you must not go to school in the morning, or you will be hungry in the fourth quarter.

Drink water:

Drink water in the morning to reduce your stomach.

Drinking water before meals will reduce appetite.

Drink water in the afternoon to reduce fat.

If your home is not far from your work place, I suggest you walk to work. If it's a little far, you should ride a bike (you'd better have enough time. If time is urgent, I suggest you buy breakfast outside and take it to school.

Don't get up too late on weekends, you will get fat. Stick to cycling or running (don't exercise too much).

Be diligent and go out for a walk if you have nothing to do.

Sleep at least 3 hours after dinner at night.

My answer may be too scattered. Summarize it yourself.

By the way, according to the national standard, 165cm 120kg seems quite standard.