I only have 143 friends on facebook?

[thankfulwren873]

Tell him that clicking the "accept" button on an online site does not constitute being someone's friend. If he hasn't ever met these people/talked to them multiple times than they are not even his acquaintances, much less his friends. He has nothing real. You are friends with people who are actually your real life friends, all of whom you actually know. I'd rather have 100 of those than 1,000 meaningless names.
Not really a burn in there, just facts, but if he's smart, he should get it. If not, I wouldn't waste my time. Just ignore him. He's being dumb. Maybe one day he'll figure out what you already know.