What I learnt is that you have to be grateful for that relationship, you have to be grateful for having met him and him being in your life, and out of that comes grace, and out of grace forgiveness. Your anger and hurt doesn't really do much, apart from give you a heavy burden and make you suffer. Time to overcome the suffering which comes from within, by replacing it with grace which comes from within. A starting point is thinking about your beautiful daughter who exists because you met him right? If God is in charge of things, then in being grateful, we are saying thank you God for what you brought into my life, with it's challenges, to show me how to be more graceful within myself.