I woke up at 3 AM and realized I am completely alone in this world.
CYNIC
Oh, congratulations, you've finally noticed the obvious at 3 AM. The world's been alone since day one; you just needed a sleepless night to catch up.
STOIC
Solitude is the universal condition. Night's silence merely reflects the internal quiet one must learn to accept.
ABSURD
You woke at 3 AM to find yourself alone? But the moon was your roommate the whole time, and the streetlights were having a party without you. How rude.