Through the Flames by Andrew Grey

Kyle Wilson hasn’t had it easy. His insecurities and nasty home life made him lash out as a kid, and when he finally came out as gay, his family disowned him. Then, just when he’s pulled his life together and gotten his construction company running, he’s caught in a fire and forced to take costly time off.
When firefighter Hayden Walters rescues a man from a burning building, he’s just doing his job. He doesn’t expect it to turn his life upside-down, but the man is none other than Hayden’s high school bully.
He definitely doesn’t expect Kyle to come to the station to thank him in person.
With awkward apologies out of the way, Kyle and Hayden realize they have a lot in common. And when it turns out someone set the fire at Kyle’s construction site to target him, they find they can solve each other’s problems too: Hayden needs a place to stay while his apartment is renovated, and Kyle doesn’t want to be alone in case the firebug strikes again. Things between the two of them quickly heat up—but so does the arsonist’s agenda. Can they track down the would-be killer before it’s too late?