I didn't know my best friend was dead.. (Own Creepypasta)

How could this happen?

It was just like always..  My mom or dad picked me up from school and I would call my best friend when I got home. I don't want to tell her real name.. I can't say her name out loud.. Her nickname was Luna. 

Like always we had nothing to say to eachother. We would or stay quiet or talk allot, we also had a time when Luna had anime theme songs playing out loud and I would run sing and dance around my living room. God.. The memories. I'll start with the story..  We were just talking about or day we had both our videochat camera on so we could look at eachother, it was just like Skype but then on WhatsApp.Luna said she was getting something to drink so I saw her walk down on the stairs to get something to drink  I waited.. And waited and waited..  30 minutes already..  I kept thinking what would take so long. I just told myself the tv downstairs was still on and she was watching a movie as usual, it happened a few times already. I've been waiting for what felt like years. I heard something coming. I looked at her door since it was wide open. I only saw a glass on the ground, maybe she dropped it by accident and was getting something to clean it up. I waited 15 more minutes.. She never came. Until I saw something  black.. Could it be her shadow? Scared I asked."Luna?.. Is that you?" It was a woman I know for sure..  It wasn't Luna.. It wasn't a person. That thing had dirty skin, I don't even know if it's skin. And it's hair.. Was dry and dark what looked like blood. It kept staring at me. I closed my eyes really hard and looked again. It was still there. Still staring at me, the dirt.. It was blood all this time. I looked on the screen and looked around in her room if she was there. I was scared. I really was..  "L-Luna?" maybe I was imagining this. I pinched myself. No.. it was real it got closer to the screen I got scared and hung up. Not knowing my best friend was laying on the ground.. Dead. My best friend I knew for 11 years was gone. How could this happen.. I couldn't even say goodbye.She didn't say goodbye. She's Really gone. She won't come back.