From your previous posts, it sounds like you really went into rush clueless (I don't mean that in a bad way, just in a factual way) and you were overwhelmed just with the being in a sorority experience in general, let alone getting close with anyone.
These are things you should do:
-Do a group of sisters eat in the dining hall together? Eat with them if your class schedule permits.
-Do a group of sisters hang out at the student center/grassy knoll/bookstore/insert campus spot here between classes? Hang out with them.
-Does your chapter have a house? Visit it often.
-Do you have mandatory meetings (I know you do, LOL)? Get to them 20 or so minutes early so you can chat with people. Don't get there just-on-time and slide into your seat w/ out saying hello to anyone.
It's college and people are not going to come to you - there are too many other options. You have to make the effort. Good luck