Get her to go on a group date with you. Get a few friends who are in on your "views" of this girl to come with you. Go to a movie or theme park or fair or something. Then your friends will leave you and her to have a bit of time together and you have a bit of a "one on one" date thing. At the end of the group date, if she liked it, ask her to go on an actual date a few days later.