Good job so far! I've only read the first chapter, and the only thing I` can think to tell you is to make sure you are consistent with tense.
it begins in present tense "So that's why I'm running away tonight. I go to my room and pack my bag and put it in my closet. I went in the bathroom, lock the door and stood in the dark for a while afraid but expecting what I was gonna see. Bright lights flooded the bathroom when I flipped the switch." but once you got to "I went to the bathroom" it starts past tense. Then it says "I ran until I was out of breath not caring about the pain in my leg. Walking down the street people pass me not caring to see why I have so many bruises on my face and why I had a slight limp in my walk" in the last paragraph, and at "walking down the street" it is present tense again.
The plot is intresting, and its promising, but make sure you read over & aloud to catch the mistakes like that ^ and missing apostrophes & such.
Yes first comment!!! I love this :) You are very descriptive, and you have a way with words. You give great insight on the thought pattern of your character :) Please please please update reallly freaking soon!