Dream about me killing someone?

So mostly the dream I had was about murder and people killing other people. Well I had a knife and I ended up just slicing them and I ended up cutting my finger and it hurt and stung so bad. I them looked at the person and they were still alive and while I kept cutting them I was sobbing and I said to them "Please just die already" because it looked like it hurt so bad and yet I couldn't control myself. I then just stopped and dropped the knife before going over to someone and just started crying even harder. So that's pretty much how it went down, any idea what it means? Its kinda the first time that happened to be me too..