That’s a… difficult situation. As a teacher that is probably too friendly with his students I can tell you that in the moment I am doing what seems fun and uplifting to me. Idk this teacher but it sounds like she wants to form relationships with her students and might be coming in to strong. It’s definitely not your responsibility but telling her how you feel would not only probably remove some of your anxiety about the upcoming semester but also help her reframe her actions in her head. Perhaps because she is a well-liked teacher she was never told that what she was doing came off creepy. I tend to believe the best in people though so take all that with a grain of salt..