My best friend just died. He (17m) and I (16f) have been friends for the better part of almost 4 years and he just passed away. I'm devastated. He had a seizure in his sleep. 

What hurts even more is we will never know why. He fails every neuro test he had taken for why he was having seizures and they never found out why it happened. It went away for almost 2 months and now... yeah..

I've been crying for the past three days. It isn't fair. Why did it have to be him? He was so nice. Even to the people who hurt him. He didn't deserve that. I just want my best friend back