On a related note to having closed body language around you, the person who secretly hates you will dodge physical affection and touch between the two of you. If you get too close they may even flinch as if they’re allergic to you or worried about getting an electric shock.This is their instinctive and strong dislike rising spontaneously to the surface and unable to be hidden.If they are in a position where they have to shake hands with you or going in for a hug is expected, they will do so as briefly and perfunctorily as possible.They don’t want to touch you any longer than they have to.