Cody by Megs Pritchard

TJ had tried to help a young Cody move from the path of self-destruction he traveled, but nothing worked. After fifteen-year-old Cody made a pass at him and TJ gently refused, Cody disappeared. TJ spent years searching and finding nothing, then came to the realization that Cody was gone.

But life had a surprise for him.
Cody had spent a year destroying himself until he learned to love who and what he was. Now he was back and back for one reason only. The man he loved. The man who had made Cody realize he was gay. TJ.

Cody is a MM contemporary romance, with some angst, age-gap, determined younger man, surprised and confused older man, and lies being exposed.