I still have a facebook account, but go there only once or twice a year. Used to have around 350 or so "friends". Mistly people I used to work or go to school with. People I don't really have to see the rest of my life.
Facebook isn't life. It's a fictional bubble that people use to portray the life they want to portray. A friend of mine posts 20 messages or links to memes a day, yet at a party he's the lone guy in a corner who don't speak much save to one or two people and comes off a bit weird.
Wouldn't put much stock in it. Then again, I'm old school, come from the generation where 3-4 real friends was all you had in life. And all you really needed. You phone them, go over to their place, invite them to yours, go out with them have a drink or visit the zoo or something.
That's real.
Facebook kinda ain't.