Male, 22, 183cmtall and only 126 pounds. How will I gain weight?

Anonymous
How the f*** can I change this ?

Im eating high dense, high calorie food since the last 7 days and getting 2000 calories a day , before this I was getting max 1500 for the last 6 years or more, so will I gain weight?

Its important Because I need to get a girlfriend and wear tshirts in public.
Male, 22, 183cmtall and only 126 pounds. How will I gain weight?
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