Did i do something wrong like go to fast, or is this girl acting flaky?

[John Sanchez]

There is this girl that friend requests me on facebook about 10 days ago, i accepted it and on that same day we talked on facebook for like 5 hours. In the conversation she tells me that she noticed me on a group that i joined, she then asked me if i was looking for anybody, i told her "no" i then asked her the same question and she said "no" so im spanish and she tells me that she is into spanish guys, and that she wanted to know a litte about me, i then got to know about her, In the end of the conversation she was like it was a pleasure talking to you, maybe we can talk tommorow", so the next day i messaged her on facebook and we had a short conversation, she took like an hour to respond back to me but she send me a message saying "im sorry it took awhile for me to message you back, going to sleep now, ill talk to you tomorow", i said its ok, then she facebooked me back and told me "thanks, and btw thank you for the bible scriptures you sent me they were really inspirational", i told her your welcome and when i get some more i will send them to you. She goes to church every sunday and loves it, Then next day i sent her a facebook message and again the conversation was short, all i said was hi and how she was doing, she then messaged me back saying hi how are you, im just getting home now, will you be up in an hour. I told her "yes", she then didnt message me or anything. So i didnt say anything to each other for like 5 days after that. I then messaged her and said hi, we then had another little conversation, and in the end i asked her if i can call her(this was my way in getting her number) she tells me yes and that wednesday would be the best time to call her because she has her last test final that day. I said "ok, what is your number" i didnt hear from her after that. So last night which was wednesday i then sent her a message saying "hi, how are you, how was your final" she had told me she passed, i said cool i was happy for her, then she asked me how i was doing, and how was my day i told her it was good and the day was good, i then asked her what she was up to and she tells me that she is about to get ready for bed. I figured it would be too late to ask her for her number so i can call her tonight, what i noticed was that she took over 10 minutes each time to respond back to me, i figure maybe she was busy i dont know, so i asked her that maybe i can call her on friday if she was not busy, she told me "i have a birthday to go to that night for my niece, im sorry" so i said to her "its ok, what day would be good for you" she responds back to me telling me "maybe this weekend, can i just contact you on facebook for now?" After upon hearing that i said "ok, that would be cool, after that she didnt respond back for the rest of the night, I'm asking did i do anything wrong, or is this girl acting flaky, what do you think?
eventhough i know this is facebook, i believe this person to be the real deal and not trying to pose as somebody else.