I was feeling overwhelmed. Meeting Bianca, dancing, rejection by Bianca, social overload, discussion of personal matters-now, just when I thought the ordeal was over, Rosie seemed to be proposing more conversation. I was not sure I could cope.'It's extremely late,' I said. I was sure this was a socially acceptable way of saying that I wanted to go home.'The taxi fares go down again in the morning.'If I understood correctly, I was now definitely far out of my depth. I needed to be sure that I wasn't misinterpreting her.
The narrator is experiencing overwhelming emotions after interacting with Bianca, which included dancing and facing rejection. This social overload makes him feel anxious and strained, as he grapples with personal discussions and the prospect of continued conversation with Rosie. At this point, he's longing for a break from the intense social situation.
As he contemplates leaving, he tries to convey his desire to go home by mentioning the late hour and taxi fares. However, he realizes that Rosie might be suggesting more conversation, leaving him feeling confused and out of his depth. He wants to clarify her intentions while struggling to manage the social dynamics around him.