Married to the Fae by Layla Moran

Idris Hadid was all of five years old when he pretend married his childhood best friend, Tam, on the playground amid the swings and slides. He hasn’t thought about that day since then, but now he’s thirty and he just got a letter in the mail telling him that his “pretend” marriage was apparently magically binding and can he please come to the faerie kingdom to grant his husband, Tamriel, a divorce.