Being alone is a physical state in which you are not in the company of others, while feeling lonely is an emotional state that can exist even when you are in the company of others - explains Dr. Patrick Potter, neuroscientist and founder of the BrainTap app. "A person can be alone without feeling lonely, and the opposite is also true - a person can feel lonely even when he is not alone." It is important to understand the difference between the two conditions, as it can affect the way you handle your emotional and mental state.