Every single line means something.
That same preface also contains a single line that really does sum everything up: 'Some other places were not so good but maybe we were not so good when we were in them.'
I don't see that a single line can constitute a stanza, although it can constitute a whole poem.
that's it - hundreds of texts and conversations, thousands upon thousands of words spoken and sent, all boiled down into a single line. is that what relationships become?