Love/Hate — L.C. Mawson

Claire had been on her own for so long, the last thing she expected was to fall in love.Being chosen as the next in a long line of warriors protecting the cities of humanity from the alien monsters from the wastes was also unexpected.Finding that her new position forbids her from seeing the girl she loves, despite the fact that her new powers are powered by her feelings of love? Yeah, that sounds about right...LOVE/HATE is the first in the Aspects series of YA sci-fi novels.