I don't want to grow up

So how come we have to grow up? Sometimes I wish I could go back to 16, when I didn't have to worry about anything. All I had to do is get up and go to school. I didn't have to pay rent, bills, or go to work. I think about all the good times I had and how it seems that I didn't have a care in the world. But when I was 16 all I wanted to be what 25. Funny how that changes?
Man, now I am 25 and I can tell you what, I am not where I thought I was going to be back then. I figured I would be married, with at least 2 kids, and a good job. Well, I guess I have part of that a kid. It's just strange how when your a kid you can't want to grow up and when you a grown up, you want to go back to being a kid.