Here is a nice passage from the Bible:
Love is patient, love is kind. It is not jealous, [love] is not pompous, it is not inflated, it is not rude, it does not seek its own interests, it is not quick-tempered, it does not brood over injury, it does not rejoice over wrongdoing but rejoices with the truth. It bears all things, believes all things, hopes all things, endures all things. ~1 Corinthians 13:4-8
Think of this as the ideal, where you want to be. You may not be there now, but that’s where you want to be some day. Talking to a priest will help as Kei wrote, but I think you will also be greatly helped by seeing a counselor or psychologist about this. You will recover from this fastest if you address it from both the spiritual (priest) and mental (counselor) sides. You cannot control how people treat you, but you can control how you react to it. Recovery will mean being able to react in a loving way towards your parents despite what they’ve done in the past. It probably won’t happen overnight, but in a few years I think you will have some peace.