My first idea after hearing this would be somnambulism - he cannot 'lie still' while sleeping an is just 'wandering free' through 'visions' and 'smoke' in spite of the second person 'sleeps nearer to him'. In more metaphorical sense I see a setting where subject feels lonely in relationship with another person so he resorts to escapism/daydreaming. He doesn't leave in a physical way since some sort of attachment ('I live to see your face, I hate to see you go') but isn't 'here' in a way he cannot center himself on reality. Perhaps this is the way to delay the ultimate break-up
My first idea after hearing this would be somnambulism - he cannot 'lie still' while sleeping an is just 'wandering free' through 'visions' and 'smoke' in spite of the second person 'sleeps nearer to him'. In more metaphorical sense I see a setting where subject feels lonely in relationship with another person so he resorts to escapism/daydreaming. He doesn't leave in a physical way since some sort of attachment ('I live to see your face, I hate to see you go') but isn't 'here' in a way he cannot center himself on reality. Perhaps this is the way to delay the ultimate break-up