Dallas Burning by T.M. Cromer

Dallas Jennings may have what it takes to be a kick-ass paramedic, but her skills in the romance department are virtually non-existent. Her inability to form a lasting relationship dates back to a tragic fire thirteen years before. How can she offer up her heart when anyone she’s ever loved gets taken from her?
Gael Martinez has spent the last three years watching Dallas shove away her every chance at happiness. As her partner, he’s witnessed all her romantic train wrecks. No longer willing to sit on the sidelines, he decides to take matters into his own hands and convince her to risk her heart one last time.

Yet, right when Gael makes it clear he’s interested in more than friendship, Dallas’s first love appears on the scene, throwing a monkey wrench into the works. As her past is dredged up, so is the long forgotten memory of the arsonist responsible for her family’s death. Will trusting the wrong person cost her the one man who can make her world whole?