I deleted my Facebook account a year ago and never looked back. I realized it was entirely FAKE. People gravitate to Facebook looking for a sense of connection, but all they end up giving/receiving is attention. These are two very different things!
Since canceling my account I have not heard from a single aunt/uncle/cousin of mine, even though I made sure to give them all my email address. Even several friends that I was extremely close to prior to moving out of state, who suddenly became too busy to agree to call/skype/email me no longer reached out once I canceled.
These one-sided relationships became incredibly apparent after canceling Facebook. "Liking" a photo of my kids is not the same as keeping in touch with me, caring about me, and wanting to know how I'm doing. Facebook enabled me to pretend like these people care about me, and ignore the fact that I was doing most of the reaching out (i.e. messaging friends through Facebook and awaiting their reply). It also enabled these people to pretend they care!
Now I focus on relationships with people who are willing and able to make time for me in real life. Neighbor friends who get together to make pizza, church friends who ask how I'm doing when I see them, my sister who is eager to set up a video call to talk to me and the kids, etc.