Sometimes it truly doesn't matter what you say or do... somebody just won't like you. That's when you realize - it's not about you. It's about them. It's about something inside of them that's troubled or threatened or simply not right. This being the case, there's nothing I can do to help the situation. This used to make me feel helpless, hopeless, and flat-out annoyed.
I finally realized there was no need to feel that way. It's out of my hands, and that's a good thing. Only God can change this person's heart. And I can pray for him. I can pray and in the meantime, be patient and not allow myself to be negatively affected by his words. When you realize this and truly do it, it lifts such a burden from you, and God replaces that burden with peace.
Love your enemies and pray for those who persecute you. Matthew 5:44