It's because you're too scared to tell anyone who you really love. Love makes us liars.

Love makes liars of us all.

He's not a liar at all. Not about important things. He'll tell you horrible truths, but he won't lie." She paused before she added quietly: "That's why it's generally better not ask him anything unless you know you can stand to hear the answer.

Love make us a liar. . Jace Wayland/Herondale, City of Ashes

Or perhaps this hostility of yours is the pretense. Love does make liars out of your kind.