"
I don't, No, I don't, No, I don't, No, I don't
Lots of debate in whether this is "I don't know" or "I don't, No I don't". This may've been intentional confusion in his words. some may say that he switched between wanting her and not knowing whether he wanted.
Hence "I don't know, I don't know, No I don't want anybody else but you" So lots of saddening confusion is here.