facebook fanatic - A Facebook fanatic is someone who spends more time on Facebo

A Facebook fanatic is someone who spends more time on Facebook than they do in real life and thinks their friends are all fake.

I spent 4 hours on Facebook today. My friend said he went to the park. I think he's lying.

I posted a status about my day. My fake friend liked it. I'm not fake.

I have 500 friends. 499 of them are fake. I'm the only real one.