A little unbroken

This is the day that everything changes/and your world stops turning/running straight into the brake lights/you've come to nothing/This is the day that everything changes/and your worlds collide/and you know in time you'll awake to find/you're a little unbroken.
I think that everyone has that realization moment. That you wake up one morning, or you look around one day, and you just realize. What you realize...that's the part that's different for everybody.
I've been thinking a lot lately about growing up. When do you grow up? When you get your first job? Move out and get your own place? Start paying your own bills? Get married? Have children? It seems that people always want to stay young: "I never grow up"..."I'm still young at heart". Is growing up when you start realizing that it's not all about you? When you start caring for other people, and putting what they want and need above what you want or need?
The above lyrics are from a song titled "Unbroken" by Missy Higgins. I think my brake lights came earlier this month, when I first realized that I was used to getting up and falling asleep by myself. I am used to living by myself now. No roommate, no parents, no dog -- Me. And it's true -- I am a little unbroken. It's not a bad thing, but it's a strange thing. It's a good thing to be out on my own, and I love it! But it seems like I've lost something...and unbroken is the only word to describe it. I'm not broken, but I feel like I've lost pieces somewhere. And I don't know how to find them...because I'm not sure what they are. Maybe that's all part of growing up. Losing things, forming new things, molding old things to fit with what's new. I guess that's the chance you take, growing up.