I ditched FB after a couple of years, it’s a waste of time. If you can’t correspond with people that matter to you with out it then something is wrong.
They offer a service at a price, although you don’t pay any money the real cost is in the information you give them. Everything about you, what you do, what you say. The people you have contact with and what they do and say, the friends they have contact with……and so on.
If you think about it for a bit, it’s not a good thing.