[adpiucf]

I'd let it go. Re-rush during formal recruitment if there is an opportunity and get involved with activities at your university (you are bound to meet sorority women and new friends this way). Rejection is never pleasant, whether it has to do with a sorority, a boy, a job, etc., but at least they called you and gave you a seemingly legitimate reason, which is somewhat reassuring that it isn't a personal "defect," you know? Technically, you aren't supposed to know why you didn't get in, per 99.9999% of sororities' membership selection processes are known only to the membership, but at least they did call you, which some never do and leave you wondering what is happening! I wish you the best and hope you clear this hurdle. Be happy-- you deserve it!