Repentance for sin, unforgivenss

Hi I have been struggling with a sin. A person in my family is a just a horrible, ugly person. They ruin my family as corroborated by my other family members. I forgive them. I even apologized to them for my fighting against them ( my father). I kept going back to the honour your father and mother. But recently I said some stuff not directed at them but that is wrong. How do I repent? I feel wrong. But my nature and sense of justice get spiked so hard. I don't belive in habitual sin. I gave up all my other sins. This one resurfaces eventide I'm around this person. Am I supposed to keep asking the lord to forgive me and then keep rising when I'm provoked. Why am I getting spiritually ragebaited???