So one of your parents abandoned you...or maybe both of them abandoned you....at least according to what you know they abandoned you. Have you moved towards forgiveness? Do you subconsciously project your feelings towards your parent(s) on other people? 

For reasons many of us can't explain or don't know, many parents go incognito on their children. Perhaps you know the reason your parent wasn't in your life and you're just not satisfied with it. Whatever your situation is - you must forgive them in order to move forward with your life.