Happy, Your school is where I went to college back in the eighties. I know how hard it can be there, and not only during rush. I'm sure it hasn't changed that much, and it breaks my heart to hear your story.
I hope this makes you fell better - I truly didn't feel "connected" to all of my sisters right off the bat. I could see that some "Susie Sorority" types in my pledge class seemed to eat, drink and live sorority life, and I kind of felt like something was wrong with me because I didn't.
I can honestly tell you that after my year of living in the house all of that changed; I made lifelong friends who I still keep in touch with. We have been in each other's weddings, celebrated the births of our kids, and commiserated when tough things came our way.
Give your house a chance. Try to bond with your housemates, you will have tons of shared experiences that you will remember all your life!
I hope so much that it turns around for you and that you have a great year in the house