Dunno man. Sounds to me like you're going to either end up without WoW or end up without a GF and you're coming upon the moment where you'll have to choose. You sound like you've already decided that the GF > WoW, which is fine, but my take is that GF's don't just delete your gear because you were whining about it. More than likely, if that was the case, she would just ***** at you about it. But the fact that she deleted your gear is usually is an obvious sign of sabotage. Maybe I'm wrong, but I think she's sending you a message.
For the record, I do have room to take, because I myself am engaged, and was playing WoW when I met my GF. Knowing that WoW and MMOs are usually poison to relationships, i made a smart choice: upgraded her PC for Christmas and bought her a copy of WoW, and paid for her account (which I still do to this day). Now we play together and still plays to this day. in fact, she actually plays more than I do, and the sad part is, her Hunter actually out DPSes me >.<
I've noticed that GFs seem to dislike it when their boyfriends are heavily involved in something that they aren't a part of and feel left out. WoW has a tendency to do that. Maybe your GF doesn't like video games. Mine wasn't too hard, because she already played an MMO (I converted her from RO), but converting her from a character she had invested years in was a challenge in and of itself, so it's still possible.
I dunno man. i guess in a nutshell, my point is, you should start making a plan for what you will do when the confrontation begins. You may think I'm an jackass now, but you'll remember this when it happens.
And to stick to OP, everyone has already said what has needed to be said, but just to confirm that, you have more than enough to regear. In fact, even without losing all the gear, at that level, it's not a bad idea anyway. I remember pretty much regearing myself around that level with AH greens anyway, just because I needed to restructure.