idk what to do

Unfortunately no, with Panhellenic rules you have to visit every sorority for at least one round and then whether or not you see them again is if you rank them high and they also invite you back. My advice is to just go through the one round and then rank them your lowest if you really don't want to go back again, it's only like a 15 minute round after all. But try to keep an open mind also, not every girl in any given sorority is going to be the same and every sorority on campus is going to have a few bad apples. Not to mention that people grow up a lot when they go to college and while the girls who bullied you could still be the same, they also might've grown up a lot since their time in high school.