The sickness

The sickness is back,
I think I need some help.
It just won't go away,
I feel like I'm by myself.
It all started years ago,
the feeling just won't fade.
I feel it is all my fault,
a monster is what I have made.
Depression ruins your life,
it sucks the life from you.
It will haunt you forever,
no matter what you do.
I feel I have no one,
I don't know what to believe.
It feels like this is the end,
I feel this disease will never leave.