Dude, I'm questioning right now the reason you're being so analytical of this whole thing. It's really not that big of a deal - and simple if you think about it. After whatever she read - she now sees you in another light, perhaps she is attracted to just what you wrote.. she probably believes that is an example of your character/personality. Her getting close to you is a good thing. You don't have to respond to it the same way she does - be yourself. If you're attracted to her in any way, it shouldn't be hard to decide what to do in response.

Honestly though? I think you're over analyzing her actions. Perhaps you should talk to her more often.