If you are unattached (or attached) and you happen to run into an ex-partner who really wasn't a good match before you allow your emotions to squeeze all common sense from your brain, take a minute to meditate on the message the universe might be sending.
If you believe that you must "save" someone, then the universe will send you someone who needs to be saved. If you feel as though you are not good enough, the universe will send you people and situations that reinforce this idea that you are not good enough. And if you truly believe that you are not deserving of love, then the law of attraction will bring unto you, those who prove that you are correct. BUT! If you believe you are worthy of love, and that you ARE good enough, all the universe will conspire to give you what you need.