Hi Carley,
At this time, there aren't any US-style sororities in the UK. You would either have to study in the US (generally as an undergraduate) or start your own sorority in the UK.
Over the years, we've had a number of UK women come on this board and ask similar questions - one was somewhat recently:
http://www.greekchat.com/gcforums/sh...ad.php?t=92162
Maybe you two can get together and start one!
.....Kelly