I wrote the following sentence
However much I know this is not the right way to approach a girl, especially when you just met her, knowing nothing about her and she knowing nothing about you for that matter.
I believe this sentence is correct, but again when I scrutinize this sentence with an editor's eye, I thing there is some problem lying with "she", marked in bold in the quoted sentence.
Another question - Is my use of "for that matter" correct?