Human beings are not meant to be alone. Long periods of isolation can cause serious mental difficulties. A social creature must have someone with which to socialize.
Sometimes we prefer our solitude, but this state of affairs cannot last. Once a person becomes isolated, they are like the single ember on the hearth. The fire will die, leaving ashes behind.
Many find themselves alone in a crowd. The number of people is irrelevant if there is no one to talk to. What does it matter to have water everywhere, if there is none to drink?
It does not require much time and effort to listen. You just stop talking: close your mouth and open your ears. Is also important to open your heart, or everything will go in one ear and out the other.
People desire to speak, even when they have nothing to say. The heart is a geyser which spews forth unbidden. Pay attention, and you might learn something.
Conversation goes both ways. Each person should have their say. Once the utterance is made, its worth can be decided.