Spending time alone is something that is truly underrated. Often, we place emphasis on trying to eliminate alone; many activities in our society are social and done in groups. When someone does something alone, they can be seen as antisocial, an outcast, or just weird. Those judgments, however, are incorrect: spending time alone can be beneficial to everyone, even the most social butterflies.
Being alone offers a way to relax at the end of a long day. Work, talking to people all day, and constant activity can be extremely exhausting. Some people may be tempted to go hang out with friends at the end of a busy day or go out on a weekend after a horrendous week. If you feel drained after such days or weeks, learn to say "no" to outings and take a day or night to yourself. There is nothing wrong with taking the time to unwind, chill out, read, or watch Netflix.
Taking time to yourself allows you to recharge your battery and be ready for whatever the next day has to bring. Those who are more introverted may feel drained more often and reject plans to be alone more, but even extroverts should say no once in a while and spend time by themselves. Everyone can prosper from a nice, relaxing night in. And no, not one where you invite friends over for a movie night; one where you are truly alone.
Alone time also allows you to learn more about yourself. We all can feel a bit lost at certain stages in our lives and can even have some slight identity crises. While it's great to consult others and get their input on things, being alone with your own thoughts can be the best way to make decisions and discover who you are. At the end of the day, you are the one who knows what's best for you; take time alone to discover your own thoughts, feelings, and interests without outside influence. Go for a run alone or spend time in nature; do whatever it takes to help encourage self-discovery and self-improvement.
Learn to spend time alone. Doing so will help you de-stress and learn more about yourself. Ignore those people who frown upon being alone, as there is absolutely nothing wrong with it. Learn to experience the benefits and relaxation that voluntary solitude can bring you.
"I love to be alone. I never found the companion that was so companionable as solitude."
-Henry David Thoreau