I'm thinking that Preston bats for the other team. He's stayed over at his "girls" house, but isn't dating her. He was "amazed" by Grand Torino, he gets excited going bowling with the guys, and he has a cat.
Edit: T.B.A. found out that Preston likes twinks.
Edit #2: He likes bonzaid trees. http://forums.bonsaisite.com/index.p...pic=16810&st=0