I sort of felt this way until really this past semester because I felt like I wasn't included as much as the rest of my pledge class. Now that I've started hanging out at the house more I see more of the girls and realized that they are all so sweet and I love all of them so much
I can be very outgoing once I get to know somebody but at first I'm usually pretty shy (in most situations at least). It can be intimidating to try and get to know all the women in your chapter at once so try inviting just a couple to go grab lunch or something. I'm sure you'll be pleasantly surprised. As has been mentioned before but deserves repeating, you get out what you put in
I learned that the hard way lol. But now that I have a position and am around more I truly value every single one of my sisters and wouldn't trade Delta Gamma for anything.