Final answer:
The speaker is addressing the reader directly using the second person pronoun 'you'.
Step-by-step explanation:
The line 10 ('and you- even innocent old you/who thought of things /(and places) I'd never think of') identifies that the speaker is speaking to the reader, as if the reader is the protagonist of the poem. This is indicated by the use of apostrophe to speak to an absent or unidentified person. The speaker is using the second person pronoun 'you' to address the reader directly, creating a sense of intimacy and personal connection.