It sounds like you've got things set up in a way that works well for you.

I had a similar experience with Facebook way back in 2008, the first time I left it. I contacted all my "friends" and asked them to email me if they wanted to stay in touch, but hardly any of them did. Most "friends" on Facebook are not real friends. But the worrying thing is, many people share a lot of themselves on FB, which to me feels really weird. It not healthy to be sharing everything about your life with everyone you know. It's like putting all your thoughts and photos on the outer walls of your house for everyone to see. It's the behaviour of an attention seeking narcissist.