How To Break Up With Your Roommate, As Suggested By The Big Bang Theory

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6. Don't get emotional

Roommates will come and go, so not getting too attached is key to making it through the potentially difficult separation process.

One possible coping mechanism? Denial and an imaginary time machine. That's the approach Sheldon took when he decided to revert back to 2003, a time that was simpler and Leonard-less.