"What You're Doing"

I was thinking about "What You're Doing" this morning and noticed an interesting feature in the structure of the first two lines:  "Look what you're doin' / I'm feeling blue and lonely."  There's a mosaic rhyme between "doin'" and "blue and," so in terms of completing the rhyme, the word "lonely" is unnecessary.  Even in the structure, then, it's left by itself, and there's something of an impression of its meaning.