You sound like you've got a good head on your shoulders. Hang in there. It seems like you're in a big chapter with a big PC. You'll find your niche. As someone else said, find a few girls who want to have a pajama party with pizza and so bad they're good movies.
I bet there's a TON of girls who would love that more than you think.
As an aside...as far as getting Orange, you mentioned you are 17. You may not have gotten bids from the other two because of age requirements. My old college roommate was a DPhiE and back in the 90s, a 17 year old went through rush and they were one of the few sororities that could take someone under 18. So it may not have been a case of Banana or Apple not wanting to give you a bid, but they couldn't. This policy may have changed for other orgs since then.