Aren't you almost 30? Why not get married? At your age, I don't really *get* moving in together. If you're really into each other, then you're just killing time. And if you're moving in together as a trial, you're hindering your ability to find someone else. If you were 23, I'd say yeah, just move in together, but at 30, and she's even older, all you're doing is wasting each other's time. Just my opinion.
*Full disclosure: I lived with Willes for a few months before we got married. We were engaged already, with date set and invitations sent.