Some people compare breakups to death. The weakest commit suicides simply because their partners dump them for someone else. Failure brings pain. Luckily, live is larger than an unsuccessful relationship. Let your ex live his life and do not ruin your life. Make it meaningful and interesting. Distract yourself and meet people. Communicate with your friends and seek career. Take up a new hobby, improve your health, do sports and read books. The list of things you can do is endless.