The Summer We Believed (Denim Days Book 1) - Shel Delisle
Melody and Duncan have been friends all their lives. They spend every summer vacationing with their parents at their lake houses which are side by side. While they thought this summer was going to be filled with carefree fun before they start their first year of college together, Duncan's father announces that he has been promoted and the whole family will soon be moving to Florida. Melody and Duncan won't be going to college together after all. And on top of all that, they secretly like each other. There's only one week until their lives will change drastically.

It's a cute story about lifelong friends who develop feelings for each other and are starting to act on those feelings. It's a quick and easy read. It'll be interesting to read what happens next in the series!