I find that when you act confidently you will automatically receive positive feedback. People just get a very different perception of you when the instant first impression of you is that of an extroverted personality or atleast not introverted.Yes, with the right people and activities. But I need a lot of positive feedback to get in the zone. More than most people I suppose. When I don't get that feedback, I suppress my sense of humor and only talk about certain things, so I come across as boring..
I know what you mean with needing positive feedback, people like us crave it. But that's how these days go, it starts well and it just builds up(both your own confidence and the positive feedback).
It's just too bad the mind runs out of fuel. You go to bed and wake up the next day being the same old person you'd rather not be.