It's probably no secret that when you don't get enough sleep you don't feel like being around your more chipper -- and well-rested -- colleagues. But a new study  says you don't feel like being around them because you don't get enough sleep -- and the feeling is mutual.

And what's more, researchers at the Center for Human Sleep Science at UC Berkeley say your lousy, sleep-deprived-driven attitude makes others not want to be around you, either.

The study says being chronically sleep-deprived leads people to be anti-social, and in turn, lonely -- particularly because their attitude makes them "socially unattractive to others."

In a statement, study lead author Eti Ben Simon offered another interesting analysis. "It’s perhaps no coincidence that the past few decades have seen a marked increase in loneliness and an equally dramatic decrease in sleep duration. Without sufficient sleep we become a social turn-off, and loneliness soon kicks in."

Great, now there's something else to lose sleep over.