Tied to depression.

Anxiety has a tight grip,
Misery loves me so,
Depression just won't let me go.
They've been my only company,
My best friends, they seem to care for me,
But though they care, I know it's not best for me.
Loosen the grip, why don't they know?
Don't they want me to be happy?
Sapping my courage,
I realize I was wrong,
I'm not their friend but a prisoner,
As they eat away at my beat up heart.