It's like...

[ She honestly doesn't want to talk about it, but leaving Kyouko to just worry about whatever she imagines it is is probably worse. ]

...Don't get mad, I know this isn't true, but I still keep worrying about it, okay? But you're so good to me, and you work so hard for my happiness... and sometimes I end up wondering... how much more time and energy you'd have for myself if you didn't keep fretting about me...