Edna3362 wrote:
I'm 22 who still feels like 12... Or 8. Deep down. And it isn't a choice.
I wasn't a rebel, nor that 'good-girl-stereotype'.
That itself isn't a problem.

At worst, it's just one of those moments of not able to relate or join, that people would take it as a sign of immaturity -- especially with peers.
I usually perceive you as around that age. I've seen posts that indicate your calendar age, and they startle me a little. It gets easier as life goes on, in my experience. For a while, everyone wants to appear older than they are, but that fades. I think most people come to value the youthful flexibility and curiosity that comes with being young at heart.
I can't believe I'm 48, but given the opportunity I'll probably forget what year it is, and hence forget my age. In another twelve years or so, I'll start to have license to act like a little kid again, so things should ease up
_________________
"I find that the best way [to increase self-confidence] is to lie to yourself about who you are, what you've done, and where you're going." - Richard Ayoade