Hang on to those life long friends. And if you have burnt bridges or hurt others in the past, try to fix it as long as you remain safe from harm. You will always have the opportunity to end someone's suffering. And if you can, and in my opinion you should seize that chance and try to fix the situations if you can't at least you tried. But do it for the right reasons and good heart and conscious behind the action.
A big realization that brought me back to a mental state that helped me. I talk about it and explain what to do. Hive it a shot and be patient. Take 5 minutes a day to not think about anything. It is a practice. Please try for your own well being. Good luck. Peace.