more like waithowdoiknowyoubook

Okay so most of you are aware of a little thing called facebook. but if you are not it is a little online network of students in either high school, college, graduate school, or alumni. It seemed like a great invention and a great way for people to keep in touch with old friends and when people go off in different directions in life. okay so thats great and all but then when you get a message saying that your good "friend" lets call her susie for identity purposes says that she misses you and she has pictures of you and remebers you when you were a kid but for the life of yourself you can't remember who she is and in fact have little or no connection in your mind to this person. what do you do in that situation? what is the appropriate thing to say to a "friend" who to you is about as foreign as the concept of microphisicology*? Do you just play along?...hypothetically

*microphisicology: defined as the small study of physicy science sort of stuff