Waiting for Them by Alie Nolan

Matty isn’t truly over his first love, even ten years later. Caleb, the boy who stole his heart when he was a teenager, and then disappeared in the middle of the night. Over the years, Matty has imagined seeing Caleb again, but his fantasy reunion doesn’t quite go to plan when he turns up at Caleb’s bakery and meets Caleb’s husband, Elliott.
Elliott is thrilled Caleb is finally getting the opportunity to reunite with the family he walked away from a decade ago. He has always known deep down Caleb’s ex, Matty, and his lost-lost family would find him one day, but nothing could have prepared him for developing feelings for his husband’s ex-boyfriend.
Caleb has never dreamed that he’ll get a second chance with the family that once adopted him, so now that he has, he doesn’t want to risk losing them a second time. Although, when a relationship begins to form between Elliott, Matty, and him, it seems like it can only go one of two ways—he could lose everyone all over again, or finally get everything he’s ever wanted.