Why love a person will eventually become hate, and like a person will eventually become sadness?

Maybe love begets hate. After all, you like someone. If he doesn't like you, you will be very disappointed. After all, unrequited love is very distressing. If he still hurts you, you will certainly hate it. Love begets hate. This is to protect yourself and love someone worthy of love. If he loves you and he doesn't love you, don't be too reluctant. Just be an ordinary friend.