I liked this, like, a whole bunch. You never really find any sweet, innocent stories any more; they all seem to be pretty angsty, so this was a very nice and welcome change.
First off, I love the layout. It's very clean and simple and the picture matches the story very well. Secondly, I love your character. Even though you don't really describe her looks and her personality, I feel as if I know a lot about her because you described what she likes to do and how she acts.
The ending was nice, too. It kind of tugs on your heartstrings as well, because you know that she can never stay young forever and that eventually, she'll have to take on responsibilities.
The layout was very nice...I especially liked the banner you used. It really went with the story well. The story was so dang-on cute. I really liked the line: "I'm not seventeen years old, I'm seventeen years young." That was such a good line...man, I'll be thinking about that for a while, haha. I used to think like this when I was a bit younger, and it was just a really nice read. Not too long and not too short, either. Good job. (: