I feel soo left out in my sorority?

[superbity]

I try my hardest to be friendly but Im a shy person so it just feels weird and awkward. Ive stuck with my sorority since I joined last semester as a cob, hoping that it'll get better but it really doesnt. I have nobody Im friends with, and my Big and I dont even talk at all. I would try to text her stuff like hey lets hang out soon, but we never would. Right now wr're having work week for recruitment and I just feel lonely because everyone is happy to see eachother and I dont know anyone.
For example during our first meeting I sat next to a girl I know a little more than the rest, and tried to talk and be social. It went okay but after the meeting we had an hour of free time. Everyone immediatelt got up and went to find their friends around the house so I was left alone. The girl next to me and her friend walked off without looking at me and I followed for like 10 sec then felt like the most annoying tagalong... So i went off by myself and tried to look for girls to talk to. But like I said I dont know anyone so I just ended up wandering around occasionally smiling and saying hi, before feeling awkward and leaving the house to walk around by myself. I felt like crying. I didnt know anyone well enough to go into their room and be like "hey, how was your summer, how is movein, etc." I know its technically my fault that Im in this position because Im quiet, but its just so hard to dig myself out of it when everyone else is already friends and I have no opening. When I try to do stuff or go with people i just get the impression they only tolerate me following them and joining in on plans.