There are many people who feel that nobody cares for them. This is usually a perception, because they feel alone, hurt, or are in a general deep depression.
We don’t always know what may be troubling someone. A smiling face doesn’t always mean happiness, and a busy person who is around lots of people can still feel alone.
On the surface, we know these things are true, but we often don’t pay enough attention to the small indications that there is trouble within someone’s heart.