Well yeah I assumed you've had other gfs but living with one is a whole other thing, if you've never done that before (and yeah, it obviously depends on the person/relationship).
"gonna wait til she turns 30 for the really big one, if you know what I mean"
You either mean marriage or kids. I mean, after you move in together, what else is there? Besides letting her peg you, of course (hey, if it's good enough for Jamie...).
"I essentially have partner-finding fatigue"
Same. Seems pretty common w/ folks our age. And the older you get, the more "the good ones" are snatched up, just leaving the psychos. Yes, if you've got a great person, hang on for dear life. Just make sure you both want the same things (that was the main mistake *I* made w/ my ex) and GET BACK TO WORK.