His Summer Prince by Aramis Jordan

Fae prince Elior and shepherd Wren have been best friends their whole lives. As they become men, their feelings for each other deepen.
But with both of them destined to marry someone else, there is no future for them.
That’s their fate.
But Elior and Wren don’t accept the path chosen for them. In secret, they devise a plan that will allow them to be together, even though outside forces are conspiring to keep them apart.
For love, Elior and Wren will risk everything.