Tears of joy or tears of blah

One minute it's a single tear of joy but then what follows are floods of sobs. Can't I do anything right? Why am I wrong so often? I struggle with being human. It's not easy for me to accept failure or admitt when I know I was wrong! Pride-anger-bitterness; emotional depression. How can I survive on more moment of disapointemnt? How do I let go of the past and worry about the future when it's today & now... Anger; Pride; bitterness