Best ways to gain weight fast?

Anonymous
I'm really underweight and I need to gain weight fast. I've been trying for months and months and have only gained one pound. Eating a lot isn't doing anything. My metabolism is overactive. What else can I do? I wonder if I should work out to build muscle but I really don't want to burn any more calories than I do just sitting and doing nothing. I don't want to be fat but I want to be closer to a normal weight. I want 10-15 pounds. Please help, tips?
Updates
+1 y
By the way I eat a lot of carbs and protein. Peanut butter, meat, beans. Cheese. It isn't working.
Best ways to gain weight fast?
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