Being shy is not a an anxiety problem in itself. However, most people with anxiety are shy.
I'm not sure if you're in the right or wrong forum, but you should be aware that many people are shy when around another person or people, but are very good at expressing themselves via email or chatting.
My advice is to tell people in person that you are shy. That way you both know what's going on, and it will probably relieve some of your shyness.