How to make a girl my girlfriend on facebook?

[Amir]

I'm chatting with a girl on fb from past 3-4 months.She also talks with me but when I prposed her she told me she has a boyfriend.i asked her to point out a thing which he dislikes in me and a thing which she likes in me.She answered flirting & my style respectively.She is always giving me replies to my messages but she refuses to show me her real pic.I came to know via mutual friend that she has +ve thinking about me.
What should I do now to make her my girlfriend.
My fb adress is fb.com\iamaak.

[raghav]

u sure its a girl and not a dude. Walk out in the mall and propose someone.