like Jenna I used to be outgoing until I get hard of hearing; now I avoid pubs and parties and so on. So yes, I've been there, and there's nothing much I can do (hearing aids don't help).
But assuming you haven't got a medical problem, can I suggest something likehappyone - only the opposite? If you think it's true that you've been putting on act, and people liked it, and you liked the results, could you put on the act again? Even if you don't feel outgoing, you could still act outgoing , if you can remember how.
Have you heard the song from The King and I recommending this?:
The result of this deception
Is very strange to tell
For when I fool the people
I fear, I fool myself as well!