Alright, here's some stuff to think about
:
The first night you mentioned that Alpha Phi did not seem fake - a great trait! And you were "definitely looking forward" to returning. As someone else said, first impressions are usually pretty on.
So you met two girls you wouldn't be friends with in the outside world. I had plenty of those in my chapter, but I had many more who were dear and wonderful friends. AND, even those girls I wouldn't have been friends with outside of Chi Omega were there for me when I needed them! That is what sisterhood is about!
Here's another thing, you mentioned you felt like they were more interested in goofing off with each other, well, they were probably poor rushers, many chapters have that. But it also sort of says to me that they really like hanging out together. (I know, as a former Rush chair I should not be condoning that kind of rush behavior, but it's what came to my mind!!!
)
Go to Alpha Phi's pref tonight with the same open heart you had when you first walked through their doors. You will know if you belong there. I wish you the best of luck and know it will work out in the end.