[URGENT] What does this mean?

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Well, to start off, we're both fourteen... now, to get on with it, there is this girl that i've liked for too long (you would assume 3 or 4 years, but actually, it's been way longer) and i'm not sure what she is thinkning... i'm not sure if she likes me or hates me... please read through the whole question and then answer.
Well, for starters... a couple of weeks back, my 'buddies' (nearly all of them) and her alike, all asked ehr the same question... and i'm pretty sure you can guess what that question was. (if not.. it's "Do you like (my name)?"
After all of them finished, she just strayed away... we didn't talk as much... and well, we just didn't contact each other at all... I honestly do miss those times...
After a few days, my close friend sat with her... and he told her "i'm sitting here to get (my name) jealous", and when he got back... he told me that she said "I hate him, tell him to stop liking me".
A week or so later, she asked me to walk with her; you would think that none of her friends were around, but most of her best friends were right behind us or right in front... let's jsut say that they were close. I walked with her... but kept silent the whole time... you could imagine why.
A few days afterwards, she just started to say that she hated me... funny considering a few days back, her friend asked me "Why are you angry at (crushes name)?"... this got me wondering; why would she care if she hated me.
When i'm around her, I would get really nervous and speak with nearly every girl around me; what's awkward is the fact that majority of them have showed some affection or alot towards me, so afterwards, she responds by talking to all the males in the class and literally ignoring me... just as how I did to her...
Whenever I talk to her via facebook or twitter, she would ignore me... but before all of this happened, she used to start conversations and keep them going for well over an hour.
All ehr friends say "Ask ehr out, who knows? you may get a yes!"
Now, to show her physical changes around me:
When we walk pass each other in the hall or something, I usually look away, and she does too, my reason for doing so is because it's scary when talking to her... i'm scared I would screw up but it never happens around any other female... but what i'm wondering is why she looks away.
Her and my cousin are distant friends, but keep in contact... a few weeks back, my cousin asked her "how's (my anme)?" and she said that she responded with "He's a flirt"
I see her looking at me in nearly every class we have together, but each lesson, she looks less at me.
When i'm close or near her, she would talk in her calm or non-crazy voice, but when i'm away, she ALWAYS talks in her crazy voice.
She says that she likes someone else, but when i'm around and someone says "(crushes name) likes (crushes crush name)" she would hit or physically shut them up; however, when i'm NOT around, she wouldn't care, and just gives a bored whatever face.
thank you