Feeling low is a natural outcome of our biology just as long as it's temporary.
Trying to make sense of what our lives should be is a daunting exercise in mental manipulation. It's a very strange and inexplicable phenomenon we humans go through with a few of us who really didn't have any goals while attending grade school. All my siblings knew what they wanted to do early in their lives, but I had no goals or motivation to do well in school.
But, it's really an irony in how life can turn out.
I drifted after graduation from high school, and after a couple of years drifting and struggling to make a living, I volunteered into the USAF because my future looked so bleak. At least I'll have a place to sleep and three squares a day. Lo and behold, they got me assigned to work with nuclear weapons, and made the rank of E4 after 18 months. I was made a team leader of a weapons team, and the officers treated me very well. I even made Airman for Six Months at Walker AFB for detecting and correcting the nuclear weapons tech manuals, and received an award by the Base Commander.
I met another buddhahead at Walker AFB, and we became close buddies. When he got his discharge, he said I should move to Chicago if I didn't have other plans, so that's what I did. He sorta adopted me as a brother, and treated me to play golf three-four times a week, went on double dates that he paid for, and I worked as an assistant matre 'd at his parent's night club on the weekends.
One summer, I drove home to California to visit family and friends, and saw my contemporaries attending college, so I decided that's what I needed to do.
To make a long story short, graduated with a BS in Business Administration with a concentration in Accounting. I worked 88% of my working career in management, married a wonderful woman (graduated high school, nursing school, and college with honors), and we raised to sons - both graduated college with honors.
I was fortunate, blessed, and lucky with most things that happened after I left the USAF in 1959. I have friends all over the world, and even met some interesting people during my travels. Lindsay Hamilton is a professional singer in London, and she's performed in several Lloyd Weber shows, and I met her on a trans-Atlantic cruise some years ago, and we still keep in touch by email. I also met Bob Brodsky, the scientist who designed the aerodynamics on the nuclear bombs I worked with in the air force. Bob also started Astronautics at USC and Iowa State Universities. I met Bob and his wife on a Mexican Riviera cruise in 2008, and we still keep in touch - about three times year. He and his wife lives in Southern California. I have friends in Dar es Salaam, Singapore, Moscow, Cuba, England, Germany, Australia, Italy, France, Canada, Mexico, and all across the US.
Happy? Yes, and I'm still traveling the world six or seven times a year.