A Quest

Once upon a time, when I was around fourteen and literally gobbled up stories about little girls who lived happily ever after, I came across one such book in the school library. It was about this ten year old city girl called Elizabeth who shifts to the country after the aunt who looked after her, gets a job someplace else. The book is mostly about how she deals with the country life. She lives there with her two aunts and uncles who insist on calling her Betty, and I also remember a scene where her uncle asks her to describe how roads are laid. Subplots include adventure in a fair with a little girl on her (Betty's) birthday, making butter, and incidents in school. At the end, of course, she decides to live in the country rather than move with her aunt to the big city.

What I am looking for is the book's name. As a 14 year old, I remember crying copious tears over it. Its purely meant for little girls who have nothing better to do than read stories about happily ever afters and ruin their concept of real life. But right now, that is exactly the sort of literature I need. Any help would be much appreciated.