How to gain weight with high metabolism?

Okay my high metabolism isnt tht bad but im 12 goin into 7th im 5'3 and only weigh 97 usually i stay the same weight for about 2 years and i really wanna gain weight cuz everyday i hear ur so skinny why are yo so skinny i get made fun of sometimes but i have tonsss of friends they ask me the same thing everyday also it sux