Making Friends (Making Friends #1) by Kristen Gudsnuk

6th grade was SO much easier for Dany because she knew exactly what to expect out of life. Now that Dany is 7th GRADE, she's in a new middle school and her friends are in different classes, drifting away.

She is totally and completely lost.

But then she inherits a magic sketchbook from her eccentric great-aunt and discovers that anything she sketches in it comes to life. So she draws Madison--the most amazing, perfect, and awesome best friend ever! The thing is, even when you create a best friend, there's no guarantee they'll always be your best friend . . . and sometimes making a friend is a lot easier than keeping one.