You've got to take time alone after a break up to catch your breath emotionally. You need to be alone with your thoughts so that you can figure out what went wrong and what you want to do about. Keep the focus on you, your needs and decide what you want in a man. Be brutally honest. If you know in your heart that based on your man's past behavior, he's got a pattern of cheating, staring at other women or calling up his ex when you two fight, then you need to be honest with yourself