depression

I know I am a quiet human, but I can feel myself getting quiet internally. It is a weird feeling I can't describe but I know it's there and it bugs me. After that silent phase, I start to hear voices. The voices of depression. They are like an annoying ring in my ear, they make my head hurt. The voices tell me to do bad stuff to myself. They want me to hurt myself, 'torture' myself. They even tell me to hurt the ones I love. The thing is, I don't want this anymore. The worst part is, they are always there. Always in the back of my head, annoying me. If I start to hear them, I am afraid of myself. I know what I can be capable of and that scares me. I am afraid to be alone. I need someone around me, so I don't do anything dangerous. Help me, I am scared of myself.