Alright, OP here again, just going to clarify the situation:
Now, here are the three possibilities for why this has happened:
A1. Hopefully not, but maybe she judged me from the short conversation as an interesting person and is avoiding me. If this is the case, hopefully just talking to her more will make her interested. She also probably dyed her hair brown because she's confident that she could get a better guy interested if someone like me was interested.
A2. Maybe she described me to a friend or her parents and they thought I sounded like a stalker or something so they told her to stay away from me.
B. Maybe its just been a coincidence? (probably not since as far as I can remember she has ALWAYS been in the library in the morning)
C. It would be awesome if this was true but I HIGHLY doubt it, maybe she's never in the library anymore because she's looking for me! Yeah, that has to be it! And she died her hair brown to gain my attention
I have a plan of my own which I will execute next chance I get to get her interest back, but I don't really feel like going into details about that. I also have attained her email address but from experience I know emailing does not work. Any ideas would be awesome.