Sadhguru
Why do I hate someone I used to love?
Hate is the flip side of love, and attachment can fall either way
Love and hate are not essentially opposites. They are two sides of the coin. Attachment can fall one way into love or the other way into hate.
If attachment falls this way it becomes love, if it falls that way it becomes hate. The moment attachment enters your life, anxiety comes, and once anxiety comes, fear follows.