[Oh no. Now Nagisa-kun's face is falling! He can't help but feel a pang of guilt when he sees that face!]

No, it's not like that at all!

[He shifts his eyes away, a little self-conscious about admitting to anything.]

I don't feel anything negative towards you! Although... I suppose I might've felt something a bit negative towards Ibara. Something like "How come you get to monopolize Nagisa-kun all the time? He's my childhood friend" ... or something like that. But that isn't your fault.