23 and counting...

People treat me different now that I'm 23. Thus in a way, I feel like that I am forced to confine myself to what society wants me to be...an adult. I've been feeling a little insecure about adulthood since the day that I've turned 20. Well, let me try to rephrase everything that I've said. I am okay with being an adult, however, I feel unprepared both mentally and emotionally to be considered as such at 23. To put it in another way, I continue to get older before I've started to mature (more) and/or figure stuff out. It's really annoying, but of course there's nothing that I can do to stop this chronological progression to wait for my mind to catch up. Does anybody else feel the same way? Or am I just crazy?