Am I a grown up yet?

I keep waiting for that eureka moment that tells me that I am a grown up.  All through my childhood all I heard was “when you grow up” or “you’ll understand when you grow up” or “do you know what you want to do when you grow up”.

Well I am still waiting for that “when” to become “now”.

I am surrounded by people who consider themselves to be "grown up" making ill-thought out decisions and immature statements that would sound childish in the playground.

I guess forgetting your childhood or deciding your childhood was different from what it really was may be a pre-cursor for growing up!

I remember my childhood, warts and all!  But when did my childhood end?  They say at 18 you are "grown up".  I certainly wasn't.  In my twenties, even though I worked, I was probably more badly behaved than when I was a teenager as I had money and could drink legally. 

So please if you could let me know I would appreciate it!