trying to gain weight

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soo Im a 15 year old female and I currently weigh about 95 pounds. I'm not horribly self conscious about my weight and Im not starving myself or anything like that, I just have a horribly fast metabolism and for me it's super hard gaining weight. like, super hard. I try to eat a "normal" amount of food for someone my age, but I frequently work out because of sports and basic fitness, and I'm about 5"5. does anybody have any tips for gaining some weight? my goal is 110 pounds. thanks x