People are assholes. I'm only half-kidding when I say that the road to wellness sometimes begins with understanding that deeply, so you can move on from it. Repeat it to yourself until you don't take their bullshit personally anymore.
As a sufferer of severe depression for many, many years, I can say that it is possible to "get over it" to a degree - eventually - but it requires retraining yourself, sometimes over decades, to think differently in certain situations.
I didn't have a doctor to go to, but I'm not sure how it would have helped to have one. Maybe cut down on the time it took me to become a more fully functional person. But a severely depressed person who remains so over years and years doesn't need a doctor to tell him he is clinically depressed. Just to write prescriptions, and believe me, I'm the sort who would have been worse off with the meds.
It's hard, but you can change the way you think and react, and therefore, the way your brain reacts chemically to situations, given time, a lot of work, and with a great degree of faith in yourself, and/or something else, whether it be religion or the Constitution or Spider-Man, or whatever. But it is difficult and it does take a long time and it requires committment. I had to make big decisions, such as staying out of romantic relationships for many years, and letting a lot of my past go, and I had to stick with those things and let go of my fear of change.
I still have small bouts with depression, and likely always will. It's chemical and it's wiring. But maintaining a full life with lots to do and be committed to, helps a lot. And, yes, so did getting fit. I was never really overweight (because I tended not to eat when going through the worst periods), but beginning a regimen of basketball after work during a really crucial time did a lot for me, as did getting back on the bicycle.
All those things helped me change the way I think of myself so that the chemicals and wiring don't get to win anymore.