Pikey

I agree Cal no doubt about it the reason most people in gym never change is they tend to think it’s enough to turn up and don’t really apply themselves. If you want to take bodybuilding up as a competitive sport then diet has a huge amount to play but whatever you got to train hard and strict.

Steve - I noticed you said you train with weights 3 times a week and cardio the other nights – I’m guessing you mean Tuesdays and Thursdays so twice as opposed to weekends as well and by cardio you probably mean something high intensity like running ? You’re obviously naturally lean and at your age with your body type your metabolism will be burning calories like mad. If your goal is to add muscle and not as cross training for some other sport then I’d say drop the cardio you won’t grow while you’re burning all the calories you eat and you only grow while you rest.

Totally with everyone’s comments about food, get as much good quality protein and carbs down your neck as you can without eating your parents out of house and home and get as much rest as you can at least 8-hours sleep a night.
Protein drinks are good but if your parents are concerned which with all the negative media hype about bodybuilding is understandable I’d leave them alone try the shake Cal mentioned. Don’t be tempted to eat junk that’s just wasted calories but the main thing man is to enjoy what you are doing.