Thanks for the excellent discussion, everyone. I've decided that I will continue to avoid social media. I don't count this site, even though it technically is, because it's not addictive and it feels safe. My depression is in remission and I've structured my life in a way that anxiety rarely rears it's ugly head anymore. I don't want to jeopardize that. I've worked too long and too hard for it. If that means I feel socially isolated sometimes, I'm okay with that.
Life and relationships did exist before Facebook, after all!