No, those lines aren't there either.
I don't remember any "long" pauses (I haven't sung the song in 30 years), but whatever there are gives the actor the chance to think about what he is singing about, so when he (or should I say "I"?) arrives at the phrase "...But alone is alone, not alive...", it was the turning point. No going back. I felt a sense of relief and I was no longer afraid to smile. I sped up the tempo so the next phrases would seem released from pent up emotion.
Not an easy song because whatever POV you have, you have to think it through phrase by phrase. Sometimes word by word.
"If my life weren't funny, it would just be true. And that would be unacceptable."
--Carrie Fisher