Feeling lonely and Feeling Alone
Feeling alone is an incapacity to stay fulfilled with just our own presence. Without distraction, learning, events, etc etc.
eg: someone has this - cannot sit alone and eat a meal at a restaurant.
Feeling lonely is an indication of the desire to connect with
eg: someone desiring to talk to other sapiens, hanging with trees, by the water, a book, my own self, my bodies pleasure in movement, sexual exchange with another etc etc.)