What can i do to increase my body size ?!

What can i do to increase my body size ?

Hi
i am 17 year old male and i am 5'6 and i really need to increase my body size .
The reason why i want to increase my size is ofcourse to impress the ladies and also to perform better at sports. I play soccer and i am pretty skilled player but the problem that stops me from performing better at games is my small body. Most of the players that i play with are bigger than me and can easily knock me out of the field. :(
So, is there any way i could increase my body size ? any kinda special work out that i can do to broaden my shoulder/chest at home ?

While others may look at you with envy, you might feel frustrated that you can't ever seem to gain weight. So what's going on? The main culprit is your metabolism, which is higher than the average person's and which is a product of your genetic makeup. We're all limited, to some degree, by our genes but that doesn't mean you can't change your body.
Gaining weight takes the same amount of focus and preparation as losing weight. Some important facts about gaining weight:
-You can't necessarily gain muscle without gaining some fat as well.
-There are no magic foods, powders or pills that will allow you to gain muscle and lose fat at the same time.
-Some people can do this naturally (again, the genes), but most will gain some fat along with the muscle
-Your body is very different from a bodybuilder--trying to gain mass to look like them is not the best idea. They have different muscle fibers than you and some may even be getting a little help from illegal substances.
-If you're a teenager, you'll have a hard time changing your body dramatically. It's changing constantly and it will change even more as the years pass.
-Gaining weight requires eating more and lifting more. Sounds simple, right?