While you are right on their intentions, the fact is that there's no confirmation as heavily hinted as it was.
That's why this is not true, if we go by technicality, they are not a canon couple.
Confirmation is everything for something to be canonical in any work. And it is also the main reason why the whole 'canon ships' discussion is completely absurd. Whether a ship is canon or not is clearly stated in its content.
Now, the good discussions come when the question is whether a ship is better or worse for the involved characters.