» Mon Nov 05, 2012 7:49 am
That's the perfect way to bring it up. If you rejected her once before (depends how long ago and how badly) then you can bet your hat that she probably still likes you (dependent on how long ago this was). So, if this was only like a couple of months or so ago and now you guys are closer friends, go for it. You can just say "I know I said no when you asked me out a while ago, but I was stupid. You're really amazing blah blah blah, do you want to go out?"
Again, this is dependent on how long ago. If this was like a couple of years ago she probably won't even remember or care. But if it was recent, (or if you guys just became closer together) you could say you weren't sure at the time or didn't know her well enough.
I don't know, I say go for it. It just depends on how you go about it.