High Plains Cyborg (Cyborgs on Mars Book 0) by Honey Phillips

When Jo’s partner abandons her as soon as they arrive on Mars, it’s yet another reminder of what she has always known: the only person she can count on is herself. She is determined not to let his absence prevent her from claiming the one thing she has always wanted - a permanent home. Earth Government is offering land to anyone who can stick it out for five years and she isn’t going to let loneliness, sandstorms, or a mysterious, attractive cyborg stop her.nnC-487 no longer feels human emotions. They have been left behind in the pain of his transformation and the long, lonely years working to make Mars suitable for human settlement. The majority of that work completed, there is little left for him now except making sure that these foolish humans don’t kill themselves or each other. Until he sees her - a tiny, determined female who makes his long-forgotten heart beat faster.