People make me sick

I have several issues like I don't like people. They make me sick. I have issues with talking to people. I feel like they are talking about me and making fun of me. I have felt this way for years. When I look people in the eyes I have voices that tell me to hurt them and if I don't stop looking at who I am talking to it gets so loud I can't hear what they are saying. I just stay away from people to avoid this. I look at people and think how I could hurt them. I feel like I am worthless and would be better off not in this world where I don't fit in. Every day I wake up it's like another day. Any info would be good.