She never wanted to be a cyborg and refuses to love one.

Restored Cyber Soldier, Marcus 582, thinks the chances of dating partial cyborg, Rachel 235, are slim. His cyborg mind can’t calculate his chances with any accuracy, but his human side can feel Rachel's resistance to his every romantic overture.

Marcus understands how Rachel feels. After all, her conversion wasn’t voluntary like his was. She wants a life without any cyborgs in it, including herself. Too bad he can’t give it to her. He’s lost all he can stand to lose in his life. He refuses to lose Rachel too.