Okay another woman's point of view.
I think you sound absolutely adorable. Firstly, When people say they are shy, it usually means you are shy until you get to know them and you feel comfortable being yourself right?
Anyway, besides what another reply said, I think shy is wonderful. I am an outgoing extrovert, and I find shy guys wonderfully sexy, and it never loses it's appeal.
Also about the car door thing. Forget that. Women have changed. They don't take terribly much notice of that stuff. Okay, I do admit i like a door being opened for me, but not the CAR door, thats kind of ridiculous and try hard. So don't worry about that. The girl being hot and all, is probably over guys bending over backwards doing stuff like that.
But I do believe like everyone else that you have a chance!!!!!!!...you are definatley in!!!!
Be yourself!!!
If you feel like calling her, do it. I know I personally hate mind games, like "ooooo I'll call her in like 12 hours"....but then again, sometimes patience can be a virtue.
Always remember "it's better to regret something you did than something you didn't do". That what I always think.
Good Luck!!!!! Please keep me posted on how it all goes!!!!!
p.s I think it's cool you didn't make a move in the carpark. Sometimes that feeling of awkwardness is a good thing. Keeps you both on your toes. But I do really think she likes you!!!!!