Why does this guy dislike my for no reason, when I did nothing to him but been polite?

We used to be on good terms. Then one day he just shouted at me and i gave him attitude back and he's been holding a grudge. I had tried being nice to him again to make up but he just shits on it every chance he gets. He is polite sometimes but usually his actions shows he dislikes me

Why does this guy dislike my for no reason, when I did nothing to him but been polite?
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