Once you discover that you can, then you must. And it's not easy. You have to take direct steps. You really have to count your blessings and you have to make a decided effort to not get seduced by the blues.
There comes a certain point in life when you have to stop blaming other people for how you feel or the misfortunes in your life. You can't go through life obsessing about what might have been.
I just try to do as good job with the material as I can and play some jazz as well, some improvised music, and do that every night. Just see where it goes.