Possessed

Something is trapped inside of me, another body, and it doesn't want to get out. It can't get out of my head. It keeps telling me things that I don't want to hear. But I can't help but listen. "YOU ARE NOT GOOD ENOUGH, NOBODY WANTS YOU, YOU WILL DIE ALONE, NOBODY WOULD ACTUALLY CARE IF YOU WERE NOT EVEN BORN, SO YOU MIGHT JUST GO AND KILL YOURSELF!" I try to concentrate on my life, but the demon just doesn't want to go away. "Wake up, think of suicide, think of me, I WILL DESTROY YOU!"
I named him Frank. He is a monster, slowly killing me with each word he says, and I don't know how to kill him. Should I kill myself in order to kill him too? Is he a part of me? Kill, kill, kill. Frank has been here for over two years now. After about six months spent with him, we still didn't figure out how he could get out, so I got used to his words. After a year, I gave up, knowing he is trapped forever. Now I realized that "Frank the Demon" has possessed me completely. I started to look like him, in my head. Even though I never saw him, I just heard his voice, he took my body, and I have become Frank. Frank is the killer. I am the killer-I want to kill people. I woke up. I was myself again, and Frank is gone forever.