I'm Bored .-.

What?

I was walking down the street towards my home. It was dark out and I was freezing. I forgot my jacket, great. I was only a few feet away from my door when I noticed it was slightly opened. I pushed it and saw this....thing? 

 I didn't know what to think, I had been so scared about this moment and now here it was, but it wasn't fear I felt. I was confused. I saw it staring at me with it's black and empty eyes, as if mocking me. I didn't run or scream. Why haven't you killed me yet?

When I moved closer, it moved back. It was familiar, I knew this thing, but how? He wasn't scared either, just.....sad. I got angry at this 'thing' and threw the glass object in my hand at it, but it didn't do anything. It just, I don't know. Fazed through it? No, it was different than that, the thing just wasn't there. I mean, it was, but it wasn't. Was I going insane? 

 I suddenly felt an urge to attack it. Kill it. I lunged at this 'thing' and grabbed a piece of the shattered glass before cornering it then slit it's throat. Finally. Wait...everything was going black. 

*Thud* 

I awoke to a bright white light and in it was the thing and....my family. My wife and daughter. The ones I lost. The ones that the 'thing' killed.  "I-I didn't m-mean to. I....I'm sorry." It fell to it's knees then held it's head to it's hands crying. The thing didn't know what it was doing. The juice went straight to daddy's head. I could still here her voice in my ears..."Daddy? Daddy what are you doing? D-daddy?" then screams. 'Her mother was just really sleepy' I heard it try to convince her, but then she asked about the red liquid. Daddy lost his temper and before it knew what it was doing, she was in the things arms...lifeless. "Daddy's sorry, sweetheart." It shushed her and closed her eyes. What had David done to my family?

What had I done?