It's just a friend thing.
Before confessing his gayness to his best friend, Tierney Terrebonne's sex life is -strictly restroom. After confessing his gayness to his best friend . . . it doesn't improve much. Why bother trying when the man he's loved for fourteen years (see: "best friend") is totally unattainable? Good thing Tierney is an old hand at accepting defeat; all it takes is a bottle of bourbon. Or fifty. Repeat as needed.
Dalton Lehnart has a history of dating wealthy, damaged, closeted, lying, cheating, no-good, cowardly men, so of course he's immediately attracted to Tierney Terrebonne. Fortunately, Tierney is so dissolute that even Dalton's feelings for the man would be better described as pity. Which becomes sympathy as they get to know each other. Followed by compassion, concern, caring, and hopefulness as Tierney struggles to change his life. When the man comes out very publicly and enters rehab, Dalton finds himself downright attached to Tierney. And as everyone knows, after attachment comes . . .
But post-rehab Tierney can't handle more than friendship, so Dalton should be safe from repeating his own past mistakes, right? Right?