Solitude is not something to be afraid of---it is, in fact, healthy to regularly spend time by yourself. Many people don't realize that, when they engage in "me time" by enjoying hobbies or other activities alone, they are actually enjoying solitude.
Being alone reduces stress. Shut off your phone and computer and let yourself relax with a book, a bath, a walk or your journal.
Solitude removes distractions and stressors that can keep you from thinking clearly and enables you to improve your focus on a project you're working on.
Periods of solitude can heighten your self-awareness because the stillness allows you to process your thoughts in peace. This can lead to critical breakthroughs or self-discovery.
The isolation forces you to rely only on yourself to get things done, which can improve self-confidence and self-reliance.
Solitude is a time-honored means of exploring your spirituality, spending time in reflection and achieving enlightenment.
You have no one to answer to when you are alone; you can do and be whatever and whoever you want to be.