I think when a girl gives you the LJBF line she means she does not look at u as a guy but rather as just one of her girl friends. I think you can be a friends with a girl and still go out with her later on, of course theres a few rules that need to be followed. Theres a lot of good posts by Pook and Mr. fingers on this subject. But heres my 2cents
First you yourself must be a man. Not just a guy with a ****. A man. You need have confidence in yourself, you must have a life, have ambition and not be a bum, be atheletic, be sure of youself, sense of humour, blah blah blah the list goes on. But first its really important that you see yourself as a man and her as the woman. When you look at yourself differently your body will follow. Your body language will speak volumes.
You being the man, should always lead. Learn to lead her. Dont be controlling or possesive rather whenever you get the chance lead her. Make the decisions. But do be considerate of her interests as well.
Kino, do a search on kino on here. Theres heaps of information.
its really important you have a life. This life takes the priority over the girl. Example sports training, she says lets go do something tonight. But you have training, what do u do? off to training mate. But dont blow her away all the time, or she will think you dont wanan hang around with her. Learn to balance this. This is the core of being a challenge. She cant control you 100%. You are not phased by her beauty. You find her attractive but just because she is hot you dont go and kiss her bum or suck upto her.
Another things is not go on talking about her problems or yours. Whenever shes out with you, she should be see you as some one fun to hang around with. Dont go talking about how you use to like this girl in high school and blah balh blah. And dont keep talking about her ex bfs and stuff. And dont read cosmo together with her. And let her see other girls flirting with you, not other way around. Pretend you are not interested in them, they dont meet your requirements. She will start seeing you as someone different.
Theres heaps of things and everyone will tell u something different, no ones wrong, kino, challenge dont call her all the time, but first you must change yourself and your attitude . Become a man, then she will start to look at you as a man and not just one her gfs.