I am assuming you are young
But you are not the only one to go through this. Abraham Lincoln would fall into depressions so deep he would close every curtain in the White House and lie in his bed in the darkness until he could function again.
Many brilliant people have suffered through this disease that eats away at you from the inside, like a worm rotting a peach.
Please remember you are not alone. That these depressions may be a part of you that as you age will become as familiar as your childhood pillow.
But it helps to have someone who listens. So yes, please confide. In your journal, in your friends, in your parents. You may need help, as depression is a dark ocean with a strong undertow. Tell someone to help pull you out.
But remember, always remember, that you are not the only one to have swum through this darkness. And you will make it through.