I have to agree with Cindie. Who cares what the label is for what you have? Is it working for everyone involved? It certainly SOUNDS like it is. So...Just sit back and enjoy it.
Now, for the no sex thing....Well...I would say this: Never say never.
Be openminded, and things may happen someday...even if you say that right now, no-one is interested in that.
So, in conclusion, never say never, be open minded, and forget the labels. If it works, don't try to over analize and enjoy the ride.