The New Boy Next Door, Uh-Oh! by Clyde Andrews

Ethan’s best friend and crush, Will, has to move out of the house next door when his parents separate. Ethan’s not happy about that, until he discovers that their new neighbours include a mysterious boy named Brett. A boy who’s not only a bit older, but very cute as well.
Despite initial hesitations, Ethan and Brett soon find themselves in a whirlwind relationship, with Brett most certainly teaching Ethan a thing or two about love.
But the sudden return of Will causes an unexpected turn of events that could have devastating results for all three of them.
Will Ethan lose his boyfriend Brett and BFF Will as the result? Or will Ethan get his happily ever after?