The Bible is clear. We are to forgive others as God in Christ has forgiven us. But how?
As the Bible says without the shedding of blood there would be no forgiveness. And that is exactly what God did for you. Jesus shed his blood for your sins. He took them away once and for all and chooses to remember them no more.
So how can we do that? The simple answer is that we can't.
We can however extend grace to another person based on the shed blood of Jesus. Like Jesus, take the initiative and extend grace to those who have wronged you. In so doing you'll be forgiving others as God in Christ has forgiven you.