The world doesn’t need more hate. It needs more love, compassion, and kindness.
If the other person was mean to you, it’s not a reflection of who you are as a human being; it’s likely something going on in their life.
That person might be the happiest, most loving individual on the planet and could just be having the worst day ever.
By choosing to respond with kindness, you make the world a better place.
Maybe that person realizes the error of his ways. Maybe he doesn’t. It really doesn’t matter.
What matters is that you took on an act of unkindness and refused to give it more power.