[Part of it might be Tohru is a professional at making things worse, herself.]

...you're not taking it out on me. At least, I don't feel that way.

All I want to do is help. Make things better, if I can. [Tohru watches her, then on impulse, leans forward to hug Korra, instead of just leaving her to hug herself.]

You don't have to tell me anything at all. It might not help anyway. There's probably nothing I can do. But this is probably better than you keeping everything walled up, right? [It was a lesson Kyo tried to teach her. She was still struggling with it.]