If she's the girl you describe, if you're a decent looking guy who isn't a mean creep, she'd be so happy to be asked. Just be nice about it, and not creepy.

"Listen, ____, you're a really nice girl and I'd really like to get to know you more. Do you want to go to the movies with me this weekend? I'd really like it."

That's all you need. Girls like to be asked out, in a respectful way~ :flounder: