Let me list the ways

In her senior year of high school, Mackenzie wants to spend as much time as possible with her best friend, Nolan, since they will be attending different colleges, but she worries that sharing her real feelings will destroy their friendship.
Mackenzie Clark has been best friends with Nolan Walker for as long as she can remember. They've shared adventures with their families, long talks about their friends and her journey with type 1 diabetes. In their senior year of high school, Mackenzie and Nolan know that everything will change as they head off to different colleges. They come up with a list of things they want to do together before graduation. But Mackenzie left the most important thing off the list: telling Nolan she loves him. Will confessing her love jeopardize their relationship? -- adapted from back cover.