you may really want to go to the bar with your co-workers but worry they don’t want you there. Or you may love parties but obsess about saying something stupid. You may feel pulled to the microphone but petrified by the crowd. You may be psyched for weekend plans with friends but get overwhelmed and cancel at the last minute, leaving you with a reputation for being flakier than a croissant. To top it off, while the introvert finds time alone refreshing, the extrovert finds it draining; indeed, too much time alone leaves an extrovert with the energy and motivation of a slug.