Don't dwell on who let you down; cherish those who hold you up. Forget the people who walked by you, knowing you were wounded and watched you bleed. Be GRATEFUL for those who crawled down into the hole to be with you.
No matter how much you water concrete, you can't grow a garden. Stop watering things that were never meant to grow in your life - wasting water on dead issues, dead relationships, a dead past. If you water what is fruitful, you will see a harvest.