The ninja 250 would be able to carry you just fine, but if you want to take your girl along on a lot of rides I would suggest something bigger like the gs500. You are probably dead set on a particular new motorcycle, but I would really suggest you get something used. Just by walking out the door you will be losing at least a thousand dollars if you ever decide to sell your bike (which you probably will in a year or two). Craigslist is super big in california, and you could probably get an older gs500 (the naked version) for only a few thousand bucks, I got mine for only 1800 once, and I turned around a year later and sold it for 2400.
~Best Beginner Motorcycles Admin