I expect MILLIONS of people are depressed, its not quite the same as post surgical depression (which is triggered by a metabolic issue)
I myself do not like drugs for depression, for alone they'll lead to dependency and side effects.
You need to consider counselling.
As to your personality point, well humans are by nature social creatures. So if you've wound yourself up in a knot in the past you'll need to address that or you'll repel people. I believe that a significant part of your problem comes from living in a place which is culturally at odds with your upbringing (unless you were born and rasied there).
I was wound up like a watch spring after 2 years in Tokyo and while I loved many things there I equally hated others. So I made a call to not be there.
Ask yourself honestly whey you are where you are (I don't need that answer, but you do).
Read some Jung, read some Jordan Peterson ... confront yourself honestly.
Its stuff like this:
https://drive.google.com/file/d/1VaVixQv36vMnXasoGVAAvNyodlqw98ph/view?usp=sharing
Best Wishes