It's ("somehow", "for some reason") + ("to be being shunned/alienated"). literally means "floating/drifting feeling", but in this context it symbolizes her sense of detachment from other people in the class.
It's ("somehow", "for some reason") + ("to be being shunned/alienated"). literally means "floating/drifting feeling", but in this context it symbolizes her sense of detachment from other people in the class.