Terrible Things by Beth Bolden

When Caleb Chance walked out in Detroit five years ago, leaving his band, millions of his fans and his lover behind, Leo knew he could never forgive.
Some things, no matter what the cause, are unforgivable.
But Leo never expected Caleb to show up again, clean and sober and wanting to get their band, Star Shadow, back together. He definitely never expected to agree to Caleb’s plan.
He never expected to confront the love of his life again—or the disaster of his past, the hopelessness of his future, and every terrible thing he’s been carrying inside him.
But maybe some things aren’t so terrible after all.