I, Bionic by Jess K. Hardy

A million stars, two hearts, only one cave.

After half-human bionic Elanie installs her LunaCorp hormone upgrade, tumultuous emotions and her changing body complicate her life aboard her deep space pleasure cruise ship, the Ignisar. Seeking answers, she’s thrown into the path of the ship’s handsome but curt physician, Sem, an empath from the ocean planet Portis.
Knowing empaths typically can’t tolerate being around bionics since AI emotions are unreadable, Sem is wary of his ability to treat Elanie effectively. Yet he finds himself undeniably drawn to her, bungling their appointments and making a fool of himself every time he sees her. Remaining professional in the face of a massively inappropriate crush becomes next to impossible.
When a mysterious voice hacks Elanie’s programming, forcing her to hijack an escape pod and jump through space, Sem follows her to the edges of the Known Universe. Stranded on an uncharted planet together, they must fight to survive deadly blizzards, arctic ice caves, and a powerful secret cult. Navigating their growing feelings for each other might prove to be an even greater challenge than escaping back to the Ignisar.