Who Dat?

For some reason I am having a hard time remembering tons of people I went to high school with. I don't mean the people that were in my grade but the people in the grades above or below me. We had a tiny school - my class was made of 62 people. I am on Facebook and people that I went to high school with are becoming friends with these other people that apparently were there and I don't know who the heck they are anymore! Was my head in the sand?
Maybe I was studying too hard and I never noticed anyone? hehehe!