There is no human being on earth who is not in some way in exactly the same position. We are all dependent on others and enmeshed in a society, without which we could not survive. This is what it means to be mortal and probably why we have a natural animal being joy in being alive. Sometimes, either maybe for chemical reasons, environmental reasons, in the north maybe low levels of sun light, or more commonly, things that have happened to us as children that screw up that natural joy as the result of being repressed because they are painful, start to surface as we become young adults, the results of any or several of which, can lead to a feeling of depression and an undefined sense of unease, a fearfulness about life, sadness, and or depression.
I would want to look into being certain you don't have any medical condition that may be causing you to brood or obsess on facts that aren't necessarily anything anybody else doesn't face, but isn't really disturbed by.
We have large brains and we use them to plan strategically for our survival, but that can become a curse if we aren't careful. Lots of Americans have built bunkers and stocked them with food and ammunition for the day when the United Nations black helicopters land. It's a problem people can have in the middle of paradise and a problem where absent, makes the worst environments on earth a paradise for the lovers of life.
As one spiritual teacher I ran across once said, "Relax and be happy".