As a man you're dating a lady and ask you 'I want to know you? I mean you in you" what does tht mean let share knowledge

It means your real self...your own self...your self when you are not under her influence or the influence of things around you.
She wants to know you outside the things you let people see.
Some people, especially ladies have that tendency to detect or discern the life of an actor. They can see beyond what you think they see.
She suspects you live a life of pretense. You are scared of her perceptions of you. You go out of your way to impress others...her in this regard. She wants you to calm down and be yourself. she wants you to get angry when you are supposed to get angry and Smile when you are supposed to smile instead of feigning a smile while you are actually hurt. Say no when you are supposed to say no even if she doesn't approve of it.
She wants to see... experience your innate character and not your acting. She may have perceived insincerity in your personality exhibitions that she wants to be proven wrong.

Advice: Don't Live to impress her disregarding your feelings. Be open minded. Some are good at observing.