The "Friend Zone" is a funny thing - we talk about avoiding it like the plaque, and in reality TRUE friendship is one of the greatest gifts we can have.
As Einstein himself said, "“The intuitive mind is a sacred gift and the rational mind is a faithful servant. We have created a society that honors the servant and has forgotten the gift.”
It's the same thing we've done with holding romance as sacred and friendship as profane.
Over the years some of my best romantic relationships came out of friendship. Just recently I've started to go back and study how / why that is.
One of my main observations was that while attraction may fade; friendship can only get stronger. Yet, in order for the romance to take root it requires fanning the fires of attraction.
If you study any of David De Angelo's materials, his mantra is "attraction is not a choice." What that means in this context is that it doesn't happen spontaneously because you're such good friends.
Something has to change. Even when I stumbled along over the years, I managed to figure out that I needed to make the move. Just like the role of the leader in dancing tango is to initiate aka "lead," attraction is based on your role as the man and leading the relationship. This allows her to be the woman - to access her feminine side. And that - more precious than jewelry - is the greatest gift that you can give.