/Immature, both of you.
So, your 12 eh?
Here is my advice for you.
Don't ask her out. Because, if i know 12 year old's well enough.. (no pun intended)
She will be just as immature as you. Which will create utter chaos for the world.
And on top of that, they're obsessed with the jonas brothers and twilight and every single thing the media and E! throws at them to grab their attention.
If you can put up with all that, still don't ask her out, because she's going to end up dumping you in a week or two anyway.
Still, get out, because you're an idiot.