How would you handling seeing people who don't like you while rushing

I plan on rushing in the fall and I do not know who is in greek life, but i have a feeling I will see people already members in the sororities who went to my high school. I didn't have many friends in high school and a lot of people picked on me and didn't seem to like me and I would just give them attitude in response which of course made me look worse. However I have grown since high school and I hope they have done the same.

I want to make sure that me getting a bid isn't influenced from high school years and if I do get a bid that there isn't so much judgment and dislike as I become a member in the sorority from girls that may have known me and misjudged me back in high school.

In case this does happen how should I handle it and not make me feel discouraged into not rushing or pledging?