Harry's Best Friend

Harry meets Hermione on the train and names her his best friend. Not having been anyone's friend, let alone best friend, before, Hermione doesn't know what to do. Luckily, she finds a book by S. O. P. Black on how to be the best best friend a guy could ask for. Unwittingly (or not) she takes everything she reads to heart. EXTREMELY AU - responsible Dursleys, Ron bashing