So there is a girl that sits behind me in English class who I often shoot the shit with while waiting for the teacher to come in. Well, found out today she wasn't who I thought she was. For the ENTIRE SEMESTER I thought this girl I was talking to was someone I went to high school with so I never bothered asking her name because I already knew it! Well I got a facebook notification telling me the person who who I thought she was's birthday was today. So I walk into class and tell her happy birthday...her birthday wasn't for another 4 months. I had mistaken this girl for someone else for almost SIX MONTHS!