you are still at that age to where you are growing. from a mothers point of view my 13 year old asked the same question. you are too young to worry about size right now, it still has time to grow your body is not done growing as of yet.
I second that statement. You're still growing into it, so don't worry about it.
Also, no matter what you hear, there is no pill that will enhance your "member". It's all in your genetics, so don't worry about it and just live your life. =) This is one issue that is grossly misleading, and tends to lead to some psychological things as well.
In a nutshell (no pun intended), You'll grow into it, and don't worry about the size, just accept it.