Cho gave her friend space as Melinda moved to look at her. And then she raised her eyebrow, "And what exactly was stupid about it? You fell for someone. And it felt good. And you let yourself feel good about it." When that good feeling just ends with no closure or conclusion - when Cedric dies, when Wood just stops calling - it feels awful but there's nothing stupid about feeling good while you can.
Not that Cho was good at living up to that in her own life.