How can I find the tall, dark, handsome man who approached me in the British Library cafe last Wednesday?

The lovely man approached me at the coffee bar in the British Library café last Wednesday, 25 September. He asked whether I would make him a cup of coffee and started to chat me up. I am shy and ran scared, but I can’t stop thinking about him. He tried so hard and was so charming and cute. I was an idiot to miss this opportunity. There was a strong connection. Can I find him when I don’t know his name and know that he’s only been there once before?