I am 14 (soon to be 15) years old girl, Asian. I am 155-157 cm tall, and after dieting I became 38 kg. I don't want to grow in height anymore, but I want to get heavier. I haven't really grown in height since I was thirteen. Is there any way for me to gain some weight but NOT gain any height?

Don't stop eating vegetables, try just giving yourself a slightly larger portion size. The reason I say don't stop eating vegetables is because you still need vitamins and minerals to live. Stay hydrated too.
Please give me feedback on my answer. Thanks.