The Time Of The Singing by Louise Blaydon
Raised by devout parents, Israfel Vacek is a teenager before he realizes he may be turning into someone his parents would shun. When he confesses his fears to his brother, Michael suggests Raf might be able to save himself if he joins the clergy.
Though Raf is well-suited to the clerical life, enjoying the piety of his parishioners, his homosexual desires don't go away. Still, Raf is able to repress them, until one young churchmen decides he wants Raf for himself. Nate Mulligan is a bundle of contradictions, a devout believer who insists their love can't be wrong, and Raf finds himself powerless to resist.
At first, Raf puts his guilt out of his mind, but when a misunderstanding brings his relationship with Nate to Michael's attention, Raf realizes he has to make a choice: give up Nate to serve the Church and save his relationship with his family... or find his own path to grace and save himself.