People that are always dwelling on, talking about and fixating on what others have negatively done to them are deeply emotionally wounded. It simply means there are roots of bitterness, resentment, insecurity and unforgiveness in their hearts. These issues must be dealt with and resolved. You can say you have forgiven but your repeated actions prove otherwise.
Jesus didn't look at His enemies while He was on the cross and try to get back at them.
He said, "forgive them Father they don't know what they are doing."
You don't respond or cast out hate with hate. You cast out hate with love.
Often times your enemy is your enemy because they themselves are emotionally wounded.
Forgiveness is a common word in Christianity and it is hard. But not doing it stops your own progress. Ask God to forgive them and you do the same.
Determine to stop trying to prove to your enemies who you are. They already know who you are or they wouldn't be an enemy.
Let your actions show you are a Christian. Let your words do the same.