Someone on one of these forums once told me that some people believe that we and others are constantly reborn in what they call soul families...so theoretically you meet the same people over and over again only their roles change. So when you meet someone the way you met this person at the party chances are high that he was from your soul family and that you knew him from a past life. maybe he was someone very close to you. In this sense I believe that it cannot be pure coincidence that you met again.... maybe there was something he meant to let you know or vice versa. Would be interesting to know what this person felt about your encounter but the way its sounds there was definately a deeper connection between you two (and I am not neccessarily talking about a love connection) though I do believe this is how you pick up your soul mate and its easy to fall in love with someone who feels so close. I hope you meet him again in this life...or the next.