Very interesting and unexpected... you do not strike me as a shy person at all... Of course, I have a very limited impression of you (only here on Steemit). I dare to say that maybe it is not really shyness but more being the introverted person who is simply just more comfortable in interactions with people whom you know. I am introvert who slowly learned how to live in an extroverted world without suffering the "shyness"part and I really recommend a great book from Susan Cain: Quiet. The book is a fantastic read, but maybe you can see here some main points and tips and tricks that might be interesting for you and persuade you to read the whole book.