Take failures as learning lessons
and build on it. Look at both sides, bad
and good,
and try to begin
and end the day with a positive. Do something meaningful for yourself and others. Don't bury yourself in a pre-made coffin lined with regrets, negativity, sourness, pessismism and narrowness, because it makes other people not want to be around you all the time and it makes you miserable. Don't listen to the depression. Take the help and support.