Roland looks at Rose.
"But..."
He pulls out his book, and sifts through the pages. He pulls out the pages where he went to broadway, and shows it to Rose. He shows her many of the pages where they did romantical things.
"Rose, don't you see this? We... we dated!"
You have amnesia Rose, or at least I think you do... Remember, when we started dating, Ferdinand crafted a mental uplink?
Rose hears Roland in her head, and see's Roland's memories.