Clear your heart from hatred for the next person. Bear in mind that the rights of people are very important. If we have to backbite or hurt another persons feelings, and we make taubah from that sin (backbiting is a major sin and requires taubah), Allah will NOT forgive us until we ask that person for forgiveness. Remember if you ask for forgiveness and the person doesn’t forgive you, then the sin will be removed from your side but nos it’s between them and Allah.
So please sleep with a clean heart.