Welcome to GC! Arin hit it right on the head. Try not to be discouraged, because each day is a fresh opportunity to bond with your sisters. Just keep doing what you're doing and eventually those friendships will come--you can't force the issue.
Also remember that Alpha Gam is for a lifetime. Although you can't see it now, there are well over 130,000 of us out there! Some of my dearest sisters (in fact, MOST of them) aren't from my chapter. I'm flying to Convention with a Delta Beta. I'm rooming with a Gamma Tau, an Alpha Kappa, and a Kappa Alpha. I frequently chat with sisters from Mu and Theta Sigma. This is just the tip of the iceberg...I haven't even started talking about the girls in my Junior Circle!
Things will get much better. I promise!

And just remember that you always have us to talk to!