That.
There’s more to college than just what goes on inside the classroom. Sounds like the OP is looking for an overall milieu that is different from her large high school. That’s a perfectly legitimate reason to want to transfer, if what she is feeling is not something that will go away - and her choices are affordable. As a LAC grad, I have a few hoary sayings of my own, such as “You have the rest of your life to work in a big city, but not everyone gets to experience life a small town or college community.”
Every LAC that has been mentioned so far has an outstanding math, physics and economics department.