If you're dating someone and they have a friend, and they say that friendship is 'just platonic', get out of that relationship!
Because 'Platonic love' is based on the teachings of Plato, and this chick and her 'platonic friend' have a love deeper than you'll ever know.
You should hope to aspire to 'Platonic love', for it exists on a higher plane than the physical, lustful plane we exist on. Fuckin' Plato, man! Fuckin' Plato!