Quarter? Hoarse.

For some reason lately I've been thinking about the phrase "acting your age" because I feel like I don't. But then of course, I have no idea what that even means. I'm 25; how should I act?
I want to be eager to laugh, but I don't want to be that annoying giggly girl.
I want to know what I'll take and what I won't tolerate, while still being open and relaxed.
My sense of humor is slightly dirty and full of sarcasm and puns; I know this and I think it's fine. Yes I still giggle at the word "pianist" but come on, it's funny.
Is there something else I'm supposed to be doing besides paying my bills on time and sending cards for family birthdays? My mom and both my sisters were married at my age (we can scratch that off the list of things to do today) and two of them already had kids (plural).
Next summer the three of us year-long interns are supposed to move in with the summer interns and I have to say I'm less than thrilled, since most of them are going to be college sophomores or around there. That's when I feel my age, when I'm around current college students and I can no longer relate to them; I feel like a chaperone rather than a peer. Ever notice that everything is so exciting and AMAZING and THE GREATEST to some of them? Bugs the crap out of me. It's like living with Smiley Smurf.
For today I wish there was a hot/cold gage to tell me if I'm going on the right track--if my idea of what 25 should look like is way off base, or if I'm just expressing myself within the boundaries of growing up.
(also: decided new dog name for a cute puppy with big eyes and long floppy ears and long fur is Jordan Catalano. Or Danny Zuko. Either would be funny. Not Burt Reynolds funny, but still funny.)