Is this a good way to ask someone out?

[soupy_peas]

It's hard to predict how people will react to stuff online.
If you want my advice, I'd say ask her on the phone. It's harder to do, yes, but it shows that you have guts- women like that. Also, it makes it a LOT more personal, and harder to dismiss (I'm sure she's lovely, and wouldn't do that, but you know...)
But that's just my 2 cents :-)

Edit: I'm socially awkward too. I'm the most socially awkward person ever. I would trump you on social awkwardness, and the weird things that come out of my mouth, but she's not just some girl you think is hot- she's your BEST FRIEND. You want to DATE her. Trust me, if it's gonna go well, you need to jump that hurdle, and go for gold. Think of how much you want to BE with her. You share everything else with her, why not this?

Edit of an edit: Use your house phone!
Or Skype her. Go round to her house.
There's no 'can't' also, it's just the idea that you find awkward, no physical impossibility.