Everyday I stop myself because that there's nothing for me at the other side of that bridge. Your success is based on the bridges and happiness you build. Know when to let that bridge burn& stop trying to save it.
Don't let someone who did you wrong make you think there's something wrong with you. Don't devalue yourself because they didn't value you. Know your worth. If you have a couple solid people in your life you can trust, you're golden.