I think all this information about he and Kate being an item is silly, and I think they are nothing more then just close friends!!! There is just way to much that makes me wonder...
1. Just a few weeks ago (was it even that long?) there were the articles all over the place that he gave his number to an "Essex Girl"...if that were the case then Kate probably isn't to happy with him.
2. They are living together, and while it is tolerated in a few Royal families, the BRitish is still way to uptight to allow that for William...
3. He chooses his friends extremely well, and I some how doubt that the friends who do know about he and his girlfriend would run to the tabloids with that story...William has more experience in that arena, and while people can misread others, I just don't see this being the case.
4. William keeps his personal life guarded, especially with girls, since he knows what the media interest can do to a relationship. It just doesn't seem likely that this piece of information could just slip through the cracks...