Thanks for the thoughts so far.
The main reason I haven't purchased a home yet is because I kept thinking I would end up leaving this area eventually. But, seven years later, still here and would have been better off buying at this point. I figure I can keep playing that game indefinitely ("but maybe I will leave in..."), but reality looks like I would be here at least five more years. And if a major financial loss would be incurred from moving, I can probably just put off the move, since it would likely be from personal preference, not necessity. But I totally agree... I wish I had a more solidly predictable future timeline.
I checked some rent vs. own calculators. A modest home where I live is around 120k (homes that are 20 or so years old, in sub-divisions). The calculator suggests it is worth buying if I can't find a place to rent for (max) 650. Well, 650 for rent around here gets you a tiny apartment in a pretty run-down, unappealing complex. Just a reasonable place (700 sq ft, one bedroom, not "as" rundown complex) will run about $750/mo.
I think I would be willing to get a roommate, but I think it would be a hard sell for my girlfriend. Still, it is totally worth considering.
I guess I just don't want to put off buying, find myself still living here five years from now, and kicking myself for not making the right financial choice. Of course, who can predict? No telling what's going to happen in the future.