My classmates hate me. I didn't do anything. Why?

In my English class this one girl that seems to can not stand me. When I ask excuse me when I go by, she rolls her eyes and moves. She always pushes me on purpose. Well not all the times. I asked her about the assigment if it was for the essay we're fighting and she said, "No" with an attitude. When I was giving out my presentation, some of my classmates didn't look intrested. My instruction bluntly told me that I need to make it more interesting and he was blunt and said that I won't get points for it. Ask for help next tone.
I like my second class better. They are nicer.