You don't need to be something for other people. In fact one of the top five regrets before dying is not allowing yourself to be you. Another is wishing you did express your true feelings.

So... maybe us people who do feel depressed and unbelievably sad during the life... have advantage of being able to change this when we still have time. We are maybe just more aware then others and have chance with some work and adjustments to find a life for ourselves (often it's a necesity).