I'm going to be briefly honest with you. I'm not sure if this is a real question or one simply because you're feeling this way. If you're wanting to starve yourself due to depression/feeling bigger. I would simply first talk with someone such as an adult or a doctor to seek help and guidance if you're in need of it. There is no way of just stopping yourself if it is a severe wanting to do something such as starve yourself. But, if it isn't severe I'd slowly move yourself to eat, starting with small snacks to small meals slowly. Don't overdo it by making yourself each a huge meal, but slowly add up to a normal meal.
