Both conditions are associate with depression , as well as poor physical and psychological health. Good social ties of all types strengthen our ability to be emotionally resilient and maintain physical health. Loneliness is not the same as spending time alone. It is a sense of deprivation in one's social life. Individual needs vary, so not everyone feels lonely who is alone.
People can feel lonely if they lack meaningful relationships, despite the company of others.
Of these three, chronic loneliness is the most challenging to overcome. Often it is linked with low self confidence and weak social skills. But, no one has to be lonely. When it occurs, it is important to realize we contribute to our own loneliness. And we can change.