*raises hand* 6 and a half years. We've known each other for nearly 14, though. We met in highschool, generally annoyed the heck out of each other, and that kind of evolved into a (
grudging? no, not really, but reluctant definitely) respect as verbal sparring partners. We had about the most atypical courtship
I've ever heard of. Depending on whose memory you trust, we either met in a morgue (biology field trip freshman year) or in the middle of a bomb threat at the high school. Either way, not particularly auspicious beginnings.

After a few years of sharpening our wits on each other and editting each others papers, we were more or less an item. I realized afterwards that most of our friends had either: 1) thought we had been an item for over a year, or 2) been rolling their eyes at us and wondering why we weren't going out for significantly more than a year. (shrug) Waited until after we'd gotten our undergrads, then we got married. Best thing that ever happened to me.
Neither of us had been planning on anything. "Things just happen. What the hell."