Stranded with the Alien by Lilah T. Bane

Mortal enemies. Deadly foes. And the only two people on the planet.

Vraxians and humans have been waging an interstellar war for nearly two decades. Neither side is willing to yield and peace is all but impossible. So when space combat pilot Kara Singh crash-lands on a deserted planet, she’s horrified to discover she’s stranded with one of the fierce seven-foot alien warriors she’s sworn to fight.
Trapped on a hostile world, the bitter enemies have no choice – they must work together in order to survive. But there’s a fine line between love and hate. And when things get heated, the alien claims Kara as his one true mate.
Not that she’s complaining. He’s big and blue, and comes with an extra set of snake-like limbs capable of doing all manner of wicked things to her.
Alone and cut off from the rest of the galaxy, they’re free to explore the undeniable attraction that ignites between them. But can they really forget the conflict that brought them together?

Stranded With The Alien is Book 1 in the Starbound series: a steamy sci-fi enemies-to-lovers romance with a kick-ass human heroine, a few laughs and a lot of action. Oh, and a ripped alien warrior with pseudo-tentacles.