How can I gain weight?

I want to become fat so tell me how can I become fat I am 18 and still look like a 13 year old boy?

so please give me solution

you dont want to get fat you want to add muscle

your great just the way you are love your body. but just work out for a little bit each day and you will build your body up. you should never want to be fat that is bad for your health..