Pretty good start. I would actually leave out the diary address, since she's just thinking to herself. Diaries are meant to last a while, but she's looking at being dead. I'd have her address her history to someone or something she knows and remembers.
And you really need to fix your apostrophe use in the teaser. "You're" means you are, "your" shows belonging to you.
Other than that - keep writing!
Author's response
Thanks a lot. That idea probably would be better than writing as a diary, i didn't really know what else to put. Thanks for the grammer as well help I know I need it :)