Fabnesia
When you lie about not knowing everything about your friend's life because you're either a stalker or you're too lazy to think of something to say.
'You don't know they got a new job? I guess I'll just say I got a new job in my head.'
You didn't know your friend had a baby? I guess I'll just say I'm gonna have a baby too.
You didn't know your friend got a new haircut? I guess I'll just say I got a new haircut in my head.