Everyone feels bad sometimes. Just like feeling very good and happy, feeling sad and lonely is a natural part of life. Being sad is a natural response to the bad things that happen in everyone's life. Dealing with being sad is a healthy part of life.
But what if you can't deal with being sad?
Sometimes being sad, upset, confused, or lonely takes over a person's life. Then it is more than just the sadness that everyone feels sometimes. It is depression. The sadness affects every minute of every day. Things aren't fun anymore. It's difficult and sometimes impossible to even think of anything happy. Sadness is all around.