Do not worry, for a male, height increases till the age of 16. I do not know what your height is currently, but your height depends on your genetics as well and definitely not on your friends height. It is definitely not a matter of shame. Even the god of Cricket Sachin Tendulkar has height of 5ft 5inch. But nonetheless you can increase your height to certain extent beyond with the help of exercises till the age of 16-17.
Next Steps
Start enjoying games like Basketball, Swimming etc where your body is stretched in the game. Involve yourself in as many games possible.