want to increase my muscle weight,and fit in to a correct shape

hi to u my son is doing the same as u i would say eat lots of chickin fish very lean meat ,also try to get some protien drinks down and eat eggs aswell have some energie bars have veg bakepotatoes  eat lots of these u need the right foods to biuld your muscle then u dont gain alot of fat .this is what my son is doing and hes increase  his muscle size it relly works but you have to sick to it keep it up and good luck and you will soon see a big change :-|.