"I don't know ___ you, but ..." (5)
I believe the answer is:
about
(Other definitions for about that I've seen before include "Circa" , "Approximately, around" , "Concerning (something)" , "Concerning; approximately" , "not far away" .)
I believe the answer is:
about
(Other definitions for about that I've seen before include "Circa" , "Approximately, around" , "Concerning (something)" , "Concerning; approximately" , "not far away" .)