I m really confused . about this matter . For a certain period of time a girl can be ur best friend and then when she becomes so close to u that u cannot do anything without her than you friend status starts to change into attraction and unknowingly u fall in love with your best fren(girl) and when she comes to know about this she's gonna say We were just frens. so  Best frends turns into just frens. So this means it means your best friendship turns into just friendship. So in this situation u need to find a new best friend(girl) and the same cycle starts and so on  and finally one day u will get ur bestfriend/ best girlfriend..............