I had a dream that I killed someone help?

I had a dream recently (no more then 7 minutes ago) about being in our new home and me family and friends were in it having a party. One of the guest was a guy I did not like sitting on his own in the other room (the house was not finished so the walls are see through) then I knew he was trying to kill me so I decided I'd kill him first. It started with me going into the old house and grabbing a shot barreled 4-10 and only had 5 rounds in it and 1 long round. I shot of 4 of the rounds just testing the rifle would work but it fell apart (the springs and joints fell out) so I ran in to grab the long one, I got in the door behind the guy trying to kill me for some odd unknown reason. He got up and walked over and grabbed a pool que, He looked at me while holding it like a weapon. So I dodged behind something and yelled "he's trying to kill me!" and my dad got up and approached him saying "I had a feeling that was what was going on" then the guy dropped the pool que as I approached him also and my dad was slowly making him walk. He picked up pool and threw them at me and said "oops one hit his eye" (it did not cause I blocked it) I dodged all of them and he got a little distance then I smacked him in the back and then got him to the floor and beat him like a slave (no offense) hit him in the crotch several times. I kept hitting him so much that he was crying his eyes out (he is like 6'5' and 19 so I was doing good for myself for only being 5'8' and 15) but anyway. as I was beating him its like I could feel an evil grin on my face. I was smiling with evil en tent and my eyes sharpened. I woke up a little after making the face while beating the guy and hit myself in the head because my muscles jerked and it felt like I was still beating the guy. My heads fine but what does all of this mean? :s