It's Hard For Me to Gain Muscle. How Would I Gain Muscle?

I find it very hard for me to gain weight and/or muscle. I'm 17 years old, 6'1, and roughly 130 pounds. I am pretty skinny. What I've been trying to gain weight and muscle doesn't seem to be working at all for me. I usually lift weights three nights a week for an hour or so, and I eat much more... show more I find it very hard for me to gain weight and/or muscle. I'm 17 years old, 6'1, and roughly 130 pounds. I am pretty skinny. What I've been trying to gain weight and muscle doesn't seem to be working at all for me. I usually lift weights three nights a week for an hour or so, and I eat much more protein than I usually do, but I can't seem to gain weight or muscle at all. Could anyone offer me any advice as to how I could get bigger? Thanks.
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