Responses
The Friend he is talking about in chapter 5.2, is the friend he killed in most horrible way not directly but intiated his suicide. He Bullied him badly, and forced the guy to sleep with his own sister. He was a psychopath and not the good one.
You will find more about him in the Trace, that is sequel of this.

Dan is an absolute psycho pos btw lol I used to find him hot well not anymore he turns me off so bad now after finding out about his past in trace