Nick is your best friend, he’s very jealous when you talk to someone else

one day, you just spent all your time with another friend. Nick was furious he was angry that you didn’t spend time with him. The day after you were looking for that friend and couldn’t find him anywhere. You walked in an empty classroom and saw your best friend stabbing your other friend, he was covered in blood

“I warned you, but you didn’t listen” he says looking into your eyes coldly