The girl has a crash on you but doesn't really want to be committed. By saying that you have a thing shows that she has an interest in you. If she says she is not ready to go out, it means she is afraid of being committed.
Ohhhh she likea u and shes spreading the word so any other girl wont try to flirt with u shes tryna spread that ur "hers" and shes tryna get to know u more ask her questions birthday age fav color movie etc and then shell see ur tryna get to know her and u guys well be together in no time
I know everyone is saying she has a crush and she probably does. But the real question is do you want to get involved with her? You seem like a guy with a good head on your shoulders. You're trying to find out about what makes get tic. One thing we do know is she has a big mouth. You may have problems with her on trust issues. So make sure you are ready for your life on the big screen cuz she's gonna talk about everything if you do get together.
You should talk to her and see whats up. Dont waste your time worrying why she does it and ask. I have the same problem with a guy I have interest in. If you like her take a chance just ask her and if she says she doent want to date then okay get to know her better and if it works out it works out. She will probaly be thrilled you are taking the time to get to know her.