To You Who Never Loved Me is a Manga/Manhwa/Manhua in english language, Fantasy series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

It was a hero with dreams of unifying the continent that saved me, who was about to become an offering made to a monster. And inevitably, I fell in love with him. But, the sad truth is, every famed and mythical hero eventually ends up with a beautiful and noble princess. And I was just a girl he’d saved. So, when he finally did unify the continent and marry a princess like any other hero, I, who couldn’t bring myself to kill you, decided to leave forever. “Goodbye, my moonlight.”