What do you do if you are shy?
If you want to be less shy, you have to view shyness as a lack of skills in social interactions and then get some practice in a variety of environments. Then, you will be able to communicate with your boss as well as other people you come into contact with with less anxiety. Many people are also introverts and need quiet space in their lives, but should be able to enjoy company of others. It is a matter of building skills and life balance.