A disease of my mind...

What's wrong with me?
Why do I feel like this?
I'm going crazy now
Nothing heard, nothing said
Can't even speak about it
All my life on my head
Don't want to think about it
Feels like I'm going insane
But I'm like a thief in the night
I'll come and grab your heart
Throw on your useless soul
we're in my world now
Watch out, you might just go under
Better think twice
Your train of thought will be altered
So if you must faulter be wise