http://en.wikipedia.org/wiki/Social_anxiety_disorder

also known as social phobia, is an anxiety disorder characterized by intense fear in social situations[1] causing considerable distress and impaired ability to function in at least some parts of daily life.

I took it as the social anxiety disorder if the anxiety leads to impaired ability to function. In social situations there's considerable loss of status from rejection, by the way, and the status is good for finding new mates, so I am entirely unconvinced that humanity in general suffers from some anxiety-impaired ability to function, especially given how the over-confidence hits an override on the anxiety, in the vast majority who haven't thought of explicitly calibrating themselves. edit: on top of that you are in the privileged 5% maybe for whom the loss from rejection is only having to try with someone else. Even in your country there's nonzero chance of getting beaten up from hitting on strangers. Everywhere else (outside first world) the chance is not even all that small.