Cara Mia, if that man has not separated you from the love of God, and he has not, then the only thing keeping hate of him alive is your thought about him. Only your pride keeps him in your memory. Dissolve your pride, and you dissolve your hate. To be still possessed of the hate that pain made is not intelligent. Take care. It can sap your energy to what you know to be your purpose. By being troubled about it, you have already discovered it to be unworthy of your grander aims, and that is the beginning of humility.
When you pray, do not pray half-heartedly. Pray with every part of your being. Let your physical body resound to your intention, your feelings and you thoughts. Let prayer manifest in your life's motives and in your aspirational body. Beyond all else, trust that your prayers will be answered as they are needed to be answered... Let your prayer carry the sound of your deepest love, for most surely Love is the cause of life and Love is its own effect... Love is universal, so part of our life's work is to become so universal in our words, thoughts, feelings and deeds that we become "the sounding box of God".