With all of Kasie West's contemporary books, I find myself smiling at the cute moments, sympathizing at the unhappy moments, and overall enjoying the read. 
 The same can be said of The Fill-In Boyfriend! 
 The book is about a girl named Gia who thinks her friends are slowly slipping away from her due to a girl named Jules. She believes that Jules is trying to oust her from the group, and a big way to do that is to make everyone believe that Gia is lying about her college-age boyfriend named Bradley. On the night of prom in the school parking lot, Bradley breaks it off with Gia...the same night she was going to introduce her friends to him and prove his existence. So, Gia finds a boy in the car nearby (he was dropping off his sister), and she convinces him to pretend to be Bradley for just the night. 
 This book was super cute and enjoyable! I loved the plot and the development of the main character, Gia. I thought that her struggles throughout the book were needed to help her character grow become a better person. I didn't care much for her at the beginning of the book due in part to her personality that came off as snobbish and pompous (which was probably the intent). 
 Enter the boy. He helps Gia change for the better, and he was adorkable throughout the entirety of the book. I'm not going to spoil his name because it's far too important to the story, but he's definitely one of my new favorite fictional loves. 
 The only negative thing I have for this book, and the reason behind the 4 stars instead of 5, is the ending. While being cute and fun, it didn't resolve a lot of the issues Gia had. I want to know (view spoiler)[if she made up with her friends, and I want to know what is going to happen about college. I also wanted to see some sort of resolution between her and Jules. (hide spoiler)] Other than those points, I thoroughly enjoyed this book!