Like Jess said.. (who just happens to be a sister of mine from another chapter..) if you feel they are stretching conversation... or whatever... it's probably not the place for you. Also remember... it's not that they hate you !!! they may think you're a nice girl, but that you'd fit in better else where for whatever reason... it has nothing to do with not liking you. I still hang out with one of the girls I met during rush whom we didn't bid. Also... since you really can't tell FOR SURE if a soror is going to give you a bid, (remember,they don't really know either until the matching after pref is all finished...) so the best advice I can give you is go with your gut and just put down the chapters that you feel comfortable with w/o consideration of whether or not you think they are going to take you. You kinda just have to trust everything is going to work out the way it's supposed to in the end.
