GIRLS I NEEEEED YOUR HELP!!!!?

Ok, so I met a girl the other day and we were talking on facebook then Monday comes along. we are talking about hanging out on friday then she asked if i could to a movie in like an hour well i try to find a ride but i couldn't so she seemed disappointed about that, she was almost begging me to find a ride and she even said she missed me???. anyway I started talking to her on tuesday and she didn't seem very cheery or rather upset. the day before she couldn't wait till friday to hang out with me but now she was like, oh i don't know i think im busy. So I asked if i upset her and of course she said no, but she just didn't seem herself. What should I do????