The Demon's Love

After having unfairly killed in my original world, I surprisingly got into another world - the parallel world. I took over someone else's body and got powerful. And what's even unexpected was the fact that I married the strongest paladin, Duke Zaren Valkyrine, in exchange of my life, including my revenge. But I also am to kill him for my self gains. However, against my wishes, the Duke keep swaying my heart and his touches proved his affection for me. I told him, "If you look at me that way, Your Grace, I'd mistakenly think that you love me." "Don't worry, I won't ever love you." He said before kissing me gently. Can I really keep pretending I don't love him, or can I muster the courage to kill him and unveil the secrets this world has?