“Don’t depend on anyone, because even your shadow leaves you when you’re in darkness.” ~ Unknown, with whom I would like to disagree to some point. A pessimist would agree with the quote; an optimist would say if the shadow was once around it will show up sometime again; but a realist would be happy because the shadow was with him until that point, and as long as the world still exist as we know it, the shadow will be there tomorrow as well. You shouldn’t necessarily depend on other people, but I don’t see anything wrong in leaning on other people from time to time. That is, as long as you trust them to not let you fall.
“Happiness can be found, even in the darkest of times, if one only remembers to turn on the light.” ~ Albus Dumbledore [or Harry Potter of J.K. Rowling if you will] Your shadow will show up again, and you will no longer be alone. Brighten up your day yourself – learn how to find light in the little things you find in life. You weren’t born alone in this world, you were born with a family, but you weren’t born together – meaning you’ll have to learn to let go, and keep on going alone. For the time being, you can lean on other people, but remember not to get ahead of yourself and lose your independence.
Your traits and freedom are your only treasures in life, cherish them.