where or when

it seems we've stood and talked like this before, we looked at each other in the same way then, but i can't remember where or when, the clothes you are wearing are the clothes you wore, the smile you are smiling you were smiling then, but i can't remember where or when, some things that happened for the first time, seem to be happening again, and so it seems that we have met before, and laughed before, and loved before, but who knows where or when