Its not to dispel all the good that you did do, or the effort that you made, but why must we dispel the good, and the effort of another simply because they hurt us "more"?
The mind is a powerful tool for healing. Changing your perspective on a situation can give you new insights and a better understanding, not only of others, but of yourself as well.
We tend to respond to situations automatically, in a way that is expected be it by society, or an inherent way of our being. If you are wronged, the "normal" response is anger, sadness, hyping yourself up with friends over a shared bottle of wine, talking about 'what a dick he is' and how 'you deserve so much better'.