Scythe & Sparrow by Brynne Weaver (Ruinous Love Trilogy, 3 of 3)

God, I want to kiss her. I want to feel the heat of her lips against mine. Would she want that? Would she melt against me if she did? Or would the tension I feel between us snap and release something feral inside her? Inside me?

Doctor Fionn Kane is running from a broken heart, one he hopes to mend in small-town Nebraska, far away from his almost-fiancé and his derailed surgical career. It’s a simpler life: head down, hard work, and absolutely no romantic relationships. He wants none of the circus he left behind in Boston.

But then the real circus finds him.

Motorcycle performer Rose Evans has spent a decade on the road with the Silveria Circus, and it suits her just fine, especially when she has the urge to indulge in a little murder when she’s not in the spotlight. But when a kill goes awry and she ends up with a broken leg, Rose finds herself stuck in Nebraska, at the home of the adorably nerdy town doctor.

The problem is, not every broken heart can be sewn back together.

. . . And the longer you stay in one place, the more likely your ghosts will catch up.

Tropes: Friends with benefits / Small town romance / Fish out of water/ Forced proximity / Hurt/care / Touch her and die