Lie With Me by Philippe Besson

Just outside a hotel in Bordeaux, Philippe chances upon a young man who bears a striking resemblance to his first love. What follows is a look back at the relationship he’s never forgotten, a hidden affair with a gorgeous boy named Thomas during their last year of high school. Without ever acknowledging they know each other in the halls, they steal time to meet in secret, carrying on a passionate, world-altering affair.