I'm so sorry that you don't seem to be bonding with your sisters-to-be.
As you probably know, if you depledge, you will have to wait a full year before pledging another sorority - meaning you can't rush next spring. And the fact that you depledged will work against you next fall; sisters will think "She cast aside XYZ, who's to say she won't do the same to us?" FWIW, I've never heard of anyone on my campus who depledged one sorority and got into another, and we don't even have all that competitive a rush.
Why don't you try calling some folks and inviting them to lunch, or coffee? Or put together a study group with some of your pledge sisters who are taking the same classes you are. People don't always come to you; sometimes you have to go to them.
Joining a GLO is a big decision; so is leaving one. Think through your options carefully, and good luck with whatever you decide.
