I agree that it is important for the other to change if the goal is a genuine, trusting reconciliation. I disagree if the initial goal is to exercise the moral virtue of forgiveness. Your statement suggests to me that you want justice and that is a good thing. Yet, justice and forgiveness are not the same thing. Try to realize that confrontation is a form of justice-seeking. I recommend forgiving before the justice-seeking so that the confrontation is not harsh. Exercising justice after forgiveness can result in a better justice-seeking and a better justice outcome.
For additional information, see What is Forgiveness?