You should def not be worried. You are a normal 16 yr old boy..Be happy with yourself and know you will find someone to love you for you NO MATTER what size your penis is....
No you should not be worried at all. Firstly you are completely normal for your age. Most men range between 5 and 7 inches. Secondly Size never matters! so if you are worried about that there is no need to worry, i hope this helps.