Has someone hated you and you could not figure out why? Such a person had hatred, or jealousy, or envy within and it came out in unprovoked hatred toward you, even as Saul hated David,

Now the distressing spirit from the Lord came upon Saul as he sat in his house with his spear in his hand. And David was playing music with his hand. Then Saul sought to pin David to the wall with the spear, but he slipped away from Saul’s presence; and he drove the spear into the wall. So David fled and escaped that night (1 Samuel 19.9–10).

The only thing you can do when someone so hates you, is to do what David did, get away from the person quickly.