The context of the following conversation is Kai improved Jan's work, but then Jan stopped talking to Kai anyway.:
Kai says I just don't understand Jan sometimes. She's impossible..
The friend responds Yeah, she can be difficult. What was it that set her off this time?.
Kai responds I have no idea. I mean, I spent so much time helping her with her report..
The friend responds You did? And what, she didn't appreciate it? Didn't say thanks or something?.
Kai responds I have no idea. She's totally stopped talking to me..
The friend responds I wouldn't worry about if I were you. You're better off without her in your life..