Revenge means unforgiveness. Jesus said those who don't forgive others will also not be forgiven by God. That means if you don't forgive, you will not go to heaven.
Jesus said: "For if you forgive others for their transgressions, your heavenly Father will also forgive you. But if you do not forgive others, then your Father will not forgive your transgressions." (Matthew 6:14-15)
Jesus even taught a parable on forgiveness.
Please see Matthew 18:21-35: https://www.bible.com/bible/100/MAT.18.NASB1995
Jesus said: "'Should you not also have had mercy on your fellow slave, in the same way that I had mercy on you?’ And his lord, moved with anger, handed him over to the torturers until he should repay all that was owed him. My heavenly Father will also do the same to you, if each of you does not forgive his brother from your heart." (Matthew 18:33-35)
Ask God to help you forgive. And do not take revenge.
God will take vengeance for you if that person does not repent.
"Never take your own revenge, beloved, but leave room for the wrath of God, for it is written, 'Vengeance is Mine, I will repay,' says the Lord. 'But if your enemy is hungry, feed him, and if he is thirsty, give him a drink; for in so doing you will heap burning coals on his head.' Do not be overcome by evil, but overcome evil with good." (Romans 12:19-21)