During the orphanage scene, when she finally talks about her feelings, it's obvious that she's pretty cut up about what's happened - but she doesn't seem to blame Rinoa for it.

I'd be very surprised if she wasn't a little jealous though. She's known Squall since they were basically infants, she's fancied him for a long time, then Seifer's ex turns up out of the blue and inserts herself into Squall's affections? That's pretty harsh.

In my opinion, Quistis deserved a hell of a lot more screentime than the game gave her. Plus, I'm a sucker for love stories with unhappy endings