There will always be more then one factor which impact on the decisions. Like if you ignored Sage till Ep7 sexually i think you need to at least have helped her with Chad or had to show you got some interest in her to get the option to start it from the party on.We don't know for certain that the Cathy incident ends Bella's route permnanently. It might be reopened like the Sage route has been. Like Sage (and pretty much everybody else), Bella definitely has the hots for the MC and it will be interesting to see whether she can keep her passions under control now he's unlocked stuff she's clearly been burying for a long time.