First off, don't just spontaneously friend request some girl from your Facebook network and
really don't just go randomly friending people on MySpace, you outdated pervert. The only way you can non-creepily get a girl through free, non-Match.com, online pursuits is if you have previously met her in person--met and spoken to her in person. Seriously, stop being so creepy.
Ok, so you met your girl, but, for whatever reason, you didn't actually get her then. All is not lost. 2-3 days--depending on how much you spoke--after your first meeting, you friend request your girl with a personal message that includes some reference to your previous conversation (i.e. "Did you ever figure out how to solve that math problem?" [If you're an effing loser.] Or, "The name of the guy who played the body of Darth Vader in the original
Star Wars trilogy is David Prowse, in case you were still wondering." [If you're awesome.])
>