i disagree, you could have a buncha friends that are girls, its just moving to the point of kicking it to the next level. There are obvious bounderies that you would have like any other kind of relationship.
but when the person is of the opposite sex, there's always that possibility that someday something potentially COULD happen. that's not there with a friend of the same sex (hopefully)
also, one person in this platonic relationship might start to feel one way and the other may not...
or the girl could just be evil and change her mind every single second about what she wants
i think the latter supercedes the former.