Strong introverts crave alone time (I-time) as if it were oxygen in the lungs for survival. I can become short of breath from inadequate alone time. I-time is non-negotiable for a high-functioning introvert. Without I-time, an introvert can suffer from distraction, imbalance, exhaustion, and irritability.
Devora Zack, Networking for People Who Hate Networking: A Field Guide for Introverts, the Overwhelmed, and the Underconnected
alone, introvert