I lied. The song isn't actually about My Antonia, but it does describe Jim and Antonia's relationship from Jim's point of view rather well, even though the song was probably written about something else.
in my eyes she can do no wrong
in her mind I'm a little child
she's the words in my favorite song
but to her I am juvenile
I'm the love she will never love
I'm the friend that she calls a…