A fine line

I feel There exists a fine line between a friend and a boy/girlfriend...
the most interesting aspect about this fine line is its so thin that you tend or incline to cross over or get confused which side you are on...
Its when you realize that you are on the wrong side or the side you don't wish to be on you experience a roller coaster ride of emotions and actions that lead to adverse effects not only between the two people but also on the people and environment one lives in as we know that the energy flow from an entity has effects on its surroundings...