I really liked this. It gave you such a great inside to the character's thoughts and how you write it's so observant and descriptive. Very well done! :D
This is a really, really good start. I love the idea, and the way you write is simply captivating. You can really hear her voice strongly, and you have a very mature tone to your words.
Just a little point. It might seem pretty pointless (and it's got nothing to do with your writing), but I think if you made a layout - or asked someone to do one for you (I'd do it, if you wanted) - it would really bring the story to life.