Whenever people ask how to stop loving someone, you can tell things are getting tough. So let me give you my personal advice. You should think about all the bad things that he did and you will surely forget your ex. There is no better way to keep him of your mind than to picture him as the evil one - the reason you got fired from work, got kicked out of your home, got suspended at school, and why your relationship failed. Convince yourself that it is all because of him so you will have reason to hate him. Reflect on all his negative characteristics. It will be easy to convince yourself how lucky you are to break up with him.