When I dislike someone else and/or believe they are hurting me, it is really my own thoughts about that person that are doing the damage. It's true that person may be doing or saying objectively hurtful things to me and it may be in my best interests to remove myself from further encounters with them, but it is ultimately only the thoughts I continue to entertain in my head about them that bring me down.
The beauty of this truth is that no matter how someone else treats me, I can choose how I react. I don't have to let it hurt me. If I change my mindset, my experience will change.
I can choose to be happy no matter how someone else is treating me. I have that power. This is MY world. MY reality.