I understand from where you are coming from. But the very point that it takes a lot of effort to be "extrovertable" is an issue. I have tried this and on the weekends where i "extroverted" myself, I feel pretty exhausted by Sunday night and dread the Monday mornings.

Perhaps, I might lie in that "unhappy everywhere" group... but I think I was pretty happy in college around the bunch of other like-minded friends. It's just that those happiness activity metrics might not best match with society's generally accepted metrics. But now that I am more aligned to general things "happy" people do, I usually find myself more aloof and unhappy along with usually tired feeling with all the "extroversion". Have practiced enough for years (especially being a founder of a company now), but it's still pretty tiring :(

Also mostly the happiness experienced in such situations is often temporary and bonds formed are feeble, as I can't keep up the "extroversion" for too long and soon become boring for a lot of people, so I am actually trying to move away from that now :)