nights, and anyone else] The HTML isn't that tricky, and as I discovered on my first move you can generally just steal other peoples' tables and the like and repaint them. Then there's that excellent basic guide people regularly post links to which I can't remember the address of...
The state of boy/girlfriendshipness must be formally announced, ideally through a public advertisment in The Times, but these days more commonly on the official web-based boards set up for this purpose.
I always understood the situation to become officially acknowledged when, and only when, you were finally caught out behind the bike shed. Or adult equivalent, I suppose, in this case.