There is a tv series called Alone, shot in extremely isolated regions of the world where contestants are dropped off separately from each other to fend for themselves with nothing but 10 items they carried in.
It is a game of survival where they must build shelter and hunt for food to survive, starting late Autumn going into harsh Winters.
What is evident however is that it is very much a mental game. Can you be alone with just your thoughts? Many can not and exit well before lack of food is a problem.
If you find yourself too deep in your own mind, reach out. Life is a different kind of survival game and it is definitely ok to seek help.
You are not alone.