What would be harder for you, to tell someone you love them or that you donot love them back? ?

Interesting question for an sociopath...
It was hard for me to tell someone I love them, because all the common ways are so cliché... And as I generally don't like or understand common rituals, I try to come with something real. But there is no other way how to say "I love you" than using those simple words, no matter how overused they are. Maybe it would be easier next time? If I would be able to love a human being next time, of course. It's easier with wolfdogs. They know it without need of explicit declaration.
I never had to refuse someone who loved me. I'm generally not very lovable being, I'm afraid. But I don't think it would be hard for me.