The person whos point of view this is from got hurt, in a very similar way to before, due to a person he loved keeping secrets but them still willing 'to recreate', or at least try to, what they had before. The pereson who's point of view this is from can't take that pain a second time, so goes tie shopping. Now you know. Note, I may be wrong or seriously lacking, and the point of view of the narrarator is not the same as that oof the signer.