"A Gentleman's Guide to Vice and Virture" by Mackenzi Lee is a fun one. Takes place in 17-something, about a young man going on tour of the continent with his best friend before his dad makes him settle down, but he gets caught up in a conspiracy along the way and ends up having Adventure! and Hijinks! The main character is bisexual but gay leaning, and more than anything, yearns to kiss his best friend. It's a good romp, and if you like it, there is a sequel about the sister.