How do I stop hating my ex?

I'm convinced that my ex is a sociopath, for there is no other explanation as to how she can be so cruel, and unfeeling. She has taken my son and has convinced the courts through her charm, intelligence and beauty to let her keep him. I actually think that she is a true witch and has bewitched the court authorities, or something because their ruling is beyond wrong. She has exaggerated and skewed the situation and now I will be denied the ability to have proper time with my son and our relationship will be forever hindered. My son is so precious to me and I absolutely hate this woman for what she has done. I am so full of anger, rage, resentment and bitterness towards her and the injustices of society in general. I can't bear it. I've never had such intense negative feelings like this. How do I forgive her? I don't want to keep suffering from such horrible feelings but I can't get over how much she has wronged me. The depth of her cruelty,coldness, unkindness and heartlessness towards me has severely hurt me.