What if you are very shy...
Then you need to think WHY you are shy. Usual is lack of confidence. So ask yourself WHY lack of confidence. Because other people are better than you- that is probably what you think.
So ask yourself 2 questions... WHY are they better? Think of some of your own good qualities that are important and then say "nuts. I am just as good as anyone else."
Or, the second option...(a better one)... think "I just don't give a heck WHAT other people think. I am just as good as they are. I am better. If they don't like it they can get los."
Once you take the view that it is YOUR opinion that matters most. That YOu are in control of YOUR own destiny... then you will find your shyness will disappear.
Or, as Minime says... alcohol.