justhey -
Do not worry about the fact that you feel close to the AOII's because you live with them - that's completely understandable. IMO, you have gone way beyond what a lot of rushees would do by keeping such an open mind and being so positive about the other groups! A lot of people would say "well here I am on the AOII floor, and I like them a lot, so I'm just going to concentrate on AOII because that makes things easier."
and as everyone else has said, if the AOII's are as nice as they sound, they won't shut you out or be too upset. I remember one of my dorm-mates from one of the other sororities I preffed running up to me when I got my bid, giving me the world's biggest hug and saying "you made a great choice." That meant the world to me.
just follow your heart and be honest and open and everyone involved will win.
