I generally say that shyness is just a nice term for social anxiety, before its pathological. Ive always been a bit shy but much less so now, when I was young drinking a drugs always quickly put an end to any shyness for better or worse. I can happily go quite a while without socialising, don't really feel a burning need for it but when I do do it usually feel the better for it. All depends on the situation though, new people in an unusual social situation is stimulating at first but quickly becomes draining.