How to reschedule a date in 9th Grade with a girl.?

Ok I just graduated 8th grade from this little private school with only 25 people in my grade, Iv liked this Girl for all 8 years I've been there, were going to the same high-school next year(its also very small) and I have a hour carpool with her to school every day, she's all I can think about, and I'm a nerdy, treky, whovien, I like to think that I a gentleman, well actually everyone at my school is. Ok I asked her out, and the first time she was busy, then I asked her out again, she was busy, so I was just wondering how you reschedule a date to the movies, Please help, I've been waiting 8 years