First off, How many years of school u got left? I would say if only one or two than don't bother transferring, esp if you're worried about meshin with the new girls.
You have to give the girls a chance. I know I used to think girls in my division were the sterotypical sorority girls...always coming to Div Con in ritual wear, and just the way they presented themselves too, tehy seemed stuck up. But as i hung out with them at LTS and convention and they invited my chapter to their recruitment retreat, I really learned that first impressions are not always correct.
These friends you've talked to might not have all the info...I mean, I could just imagine what the frat. men back home would say about our sisters! (good and bad)
I'd say give the girls a chance...hey I'm going to LTS, you want me to scope em out for ya
In the end, do what's best for you! (I of course would put the emphasis on school, but you may choose to put your reltationship first)
Good Luck with your decision!