I was at my friend's concert last night and there was a girl there who I could have sworn I knew -- Went home, pulled out my High School year book and lone and behold, she graduated the year after me. So I added her on Facebook (did it from the concert event so she knew I was there, even though I was standing next to her all night). I didn't talk to her last night or anything, but left her a message on her wall that just said I knew she looked familiar. She replied, so no problem there. Now, how can I pursue this without seeming like a creep? I literally never spoke to her in High School and only saw her passing in the hallways.