Iowa (Traveling III) Lyrics

Lyric discussion by splitter2 

Cover art for Iowa (Traveling III) lyrics by Dar Williams

The first two verses seem to be all ponderings about her bisexuality, and maybe regrets for never having fully explored it? I don't really understand the 3rd verse though... is she talking about how she has put it all in the past, and now she is in a committed relationship with a man? (but still dreaming about the past regrets?)