The Outcast by E.M. Denning

Ethan Bennett is too old for Mickey.
Ethan Bennett plays guitar, barbecues as often as possible, and owns a diner. He’s a widower whose life still revolves around his sons, but he wouldn’t have it any other way. When Mickey, a younger man his son Taylor had been helping shows up at the diner, cold to the bone, thin as a rail, Ethan knows he can’t send him away. He expects to help Mickey out for a while, what he doesn’t expect is the way the quiet younger man occupies his every waking moment.
Mickey Underwood has had it rough. All he’s got to show for his twenty-five years on the planet is a high school diploma, no relationship with his parents, and a long list of regrets. If it weren’t for Ethan, Mickey would still be homeless, or probably dead. He knows that as sure as he knows he’s never made a good decision in his life. He should take off and forget about Ethan Bennett, his guitar, and his raspy voice. But he can’t make himself leave and he can’t make himself stop feeling things for Ethan.
Forced to face his feelings for Mickey, Ethan must also deal with the fact that he never came out as bisexual. He’d been happy in his marriage to Sarah, and after her death, he was too busy raising their kids. Even when his boys were all grown up, Ethan still didn’t have a lot of interest in dating. So why does he want to dust off his heart for Mickey? He doesn’t doubt his sons will support his sexuality, but will they be happy that he’s found love with someone their age?