Most Helpful Guy
Sometimes memories of the past make you think someone is your perfect match because you didn't have the chance to be together in the past and you want it to happen now.
I had a similar situation where I loved a girl in highschool, she loved me too but we didn't developp a relationship until one year after when she told all she felt for me on facebook. Well at first both of us were happy but we were relying to much on the past because we wanted to make it perfect but we stayed together not so long because we saw we were not a good match now.
So you should definitively get contact with him, a message on Facebook is good and tell him how you feel and also tell him you want to meet him, but people change so you'll see if you still like him or not and be carefull not to get attached to the past version of him.1