I know that it's tough to get cut from places you thought you were really into, but I'd advise you to go into the rest of your rush with an open mind. I know that I was really torn between two sororities when I went through rush, and pref night really changed my mind! Pref nights are so special and I advise going to all of them, even if you think it's not for you. You never know until you finish it out what can be right or wrong. Best of luck
