What are some polite ways to explain your need for privacy to someone who frequently pops in?

Can AI ever truly reduce human loneliness, or does it just change how we experience it?
Why don't more women call each other out for perpetuating gender stereotypes?
Is a breakup valid if your partner never seems interested in and never initiates emotional/spiritual conversations?
What about a guy telling me he wants to be friends, it hurt, he hugged me, cried on his neck, how did that make him feel?