Simon vs. the Homo Sapiens Agenda by Becky Albertalli (Creekwood #1)

Not-so-openly-gay Simon Spier is blackmailed into playing wingman for his classmate or else his sexual identity—and the identity of his anonymous pen pal—will be revealed.

Recommended by Ms. Charpentier, Librarian: “Sweet and funny. Essentially an episode of Catfish done as a romance rather than a mystery.”