Why did she stop talking to me? Please some FEMALE advice?

So me and a girl were talking through facebook email and then last monday I sent her a message and she never responded. At first I thought she didn't get it, but wednesday she text me being really nice asking about something I mentioned in the email. So she obviously read the email, but I said that I couldn't meet her that afternoon, but probably in the evening. I even mentioned in the email"its a busy week, but I got you this wednesday and if not this wednesday next wednesday"since she lives about 25 miles from me and I am not always there.So I was free later that even on wednesday and I text her to meet and she said she was preparing to sleep so I said goodnight and she said goodnight, enjoy the night. That was the last time we spoke.It is now 8 days later and I see her facebook all updated and stuff and still no response from her. I don't get what happened.Any females know what is running through her mind and what happened? Why didn't she get back to me? I am not even 100% sure she likes me but she gives me so many mixed signals and now im just all confused. In the email I basically answered some questions she answered and i asked her a question or two she loves answering.I don't know what to do, please help someone, this is driving me nuts.In the message we were just talking about dating. She told me that she hasn't had a boyfriend in a loong time, and she only dates a lot because she is really insecure about guys cheating.I told her that im not a loser like most guys and not everyone is and that when its dating my options are open, but when it comes to a relationship its"me and wifey, that's it"We aren't strangers, we used to go to college together till she dropped out.

She could be interested in another boy. Or she could be not sure whether she's ready to see you for the first time. I really hope you didn't rush into anything. What did u say in the email?You need to take it slower with her. Why would you even date on the internet anyway?