You're just shy .. that's OK. But if you want to be more friendly, smile more and people will react better. <br />
It's amazing how people react when you smile at them and say "Hello". That's a pretty easy start ...
Ah, yes . . . people look at me, for example a clerk, a waitress, a fellow plane passenger, or just walking by and from their initial ex<x>pression I see that "oh oh" look on their face, then I smile, say a small peasantry and the relief on their faces and in their eyes is priceless.