Man is a social creature, bound to need others. He needs to feel his own worth, that someone needs him, loves him and appreciates him.
However, it is normal that one does not love all the people they meet in their lives. Some people reach a stage where they feel annoyed, hurt or frustrated with people. This feeling can make it difficult for you to go about your life and interact with others on a daily basis. Hate is an intense emotion that can negatively affect your health.