First off I have a handful really great friends that I have met here on the forums that I trust. If one of them needed a hand with something I would try to be there and help. And there are a few that I would come help even though I have not met them in person yet.
For me Facebook is different than the forums. The forums are open discussion with mostly strangers. I don't allow just anyone to friend me on Facebook and any discussion and any discussion I have is with "my friends". I don't have time to sit down and write emails to all of my friends in order to keep in touch but Facebook allows me hear how they are doing. From my high school buddy who is struggling in Japan, to my former room mate in Dallas, facebook has kept me in touch with folks I have not seen or heard from in yeeeears.
Facebook does not make me feel younger. It's a communication tool, that's all.