Like someone else said, the four words "So, what are we?", IMHO, is the easiest way to go about it.
I hate "State of the Union" addresses.. and I know my BF hates them.
When we were always together and hugging and stuff, people would say "awwwww ya'll are so cute!! How long have ya'll been together?"
And we'd both kinda go into our "history"... met in high school ... went to prom.. blah blah blah.. but neither of us said we were "together"... and one night when the 547th person asked me that, I got tired of wondering, so I jokingly asked him later on"So, what are we anyway?" And he said we were "together"... so yea... worked out just fine.
I avoid "State of the Union" addresses at all costs...just enjoy your time together... no point in being all soap-opera-like