It's also worth noting we've gone to every rush event. And yeah, I wish I knew why they hadn't bid me quickly either.
They send out text messages though reminding us that they have rush events coming up that day, is there a point where they'd stop sending me reminders, maybe as a hint I'm not gonna get a bid?
From what you're telling me, it sounds like they're nicely telling you "thanks but no thanks." You never know if you'll get one and by the sound of things it seems like they don't think you're a fit with the chapter.
You can still hold on to hope that this chapter works out, but if you really want to join greek life look at the other options that you fit in with. Just because all your friends do the same thing doesn't mean you have to.