Platonic Relationship

There has always been a question about platonic relationship. Does it really exits? I'm not even sure if I have experienced it before but personally I think such things really do happen. What if a gal and a guy spend an infinite time together? Can they still remain as good friends or will something else happen? Does a gal who is able to clique with you and able to talk about everything under the sun constitute a good female friend or is she interested in you? I have yet to find out. Even if the gal is already attached, does it mean that she cant be interested in you? This society is heavily bounded by morals and the gal has got to stay somehow loyal to her boyfriend. The ladder theory (www.laddertheory.com) shows that a gal differentiates a good male friend and a boyfriend clearly but somehow I think there is an invisible region or gray area in between the top of the 2 ladders. Can you really tell ur boyfriend everthing? or sometimes is it better to not talk about some stuff and share it with your good friend instead? If its such a case, what is a boyfriend for then when you tell the most sensitive issues with your good friend? Does a platonic relationship = boyfriend with no sex? or perhaps I have no idea how to differentiate between liking a person and just taking her as a good friend; to me, they feel the same until now. Perhaps I have not met the gal who will make me feel differently. How differently, that I do not know. Somehow I see couples as = ' a guy and a gal who can communicate really well'. I do not see that special element in a couple which those great love stories talk about. In this case, is it just another 'unknown' plationic relationships? Humans are complicated creatures, or is it juz me?