From time to time I hear about people saying that old friends are more genuine so you should cherish the friends you have been known for long. I do love my old friends and feel blessed that I can still keep in touch with them after so many years.
Recently, a simple idea came to me and it helps explain why you feel that old friends are more genuine: not because they're more genuine people but that you're also treating them genuinely.
In other words, your genuineness brings up their genuine side. When you try to protect yourself by building a shell around yourself, people around you can feel it and thus they'll act the same way.
So, next time you say that some people aren't that friendly or phony, ask yourself: are you being unfriendly or phony to them too? I bet you're and if you care, someone will have take the first step by opening him/herself up :)