Throughout the song, Robin Thicke uses imagery and metaphors to portray the emotional distance and lack of intimacy in the relationship. He sings about feeling like a stranger in his own home and compares his heart to a "lonely island" adrift in the sea. The chorus emphasizes the sense of isolation and loneliness, as he repeats the line, "It's a lonely world, when you're alone."
He goes on to describe how he feels like he's lost himself and his identity in the relationship, singing, "I'm losing myself in the distance, I don't know where I belong." This reflects his inner struggle to find meaning and purpose in a connection that is no longer bringing him fulfillment.
The bridge of the song offers a glimmer of hope as the singer expresses a desire to reconnect and find a deeper understanding with his partner. He sings, "I wanna close my eyes and pretend, That you're still mine." However, the chorus returns, reiterating the loneliness he experiences despite being in a relationship.
Overall, the song "Lonely World" by Robin Thicke explores the emotional toll of being in a disconnected and unsatisfying relationship. It captures the feelings of isolation, longing, and the desire for a deeper connection that can make the world feel less lonely.