See Before You Wave

Allright today in the library theres this girl whose kind to everyone and shes in my class and sometimes she waves at me as a sign of saying hello. And apparently I was caught up with my music and saw her wave at my direction and well I waved back only to realize she was waving to the person behind me. Ok that was hell embarassing and some of my classmates saw it. So what do I do? Music time just to forget my stupid wave.