What do you do to prove to someone you don't hate him?

Ok i have a guy friend who always thinks I'm mad at him. I'm not though i have been going through a ruff time and i have been down. He knows this and he says he gets it but then he just comes up to me and says that i hate him. What do i do? I love him so much he is like my best guy friend/brother. So i don't want to loose him. Help!