In the lyrics for Galileo Galilei's 嵐のあとで, there is a line:
which a translation online says "You said 'Goodbye', I replied, 'Goodbye'". Could this be also read as "I said 'Goodbye', you replied, 'Goodbye'"? How do you determine who is the speaker and who is spoken to?
The lines up to this point are, if you'd like them for context:
Please correct the lyrics if need be, especially the kanji: if I could written something in kanji or something should not be written in kanji etc.