I don't feel like a "dying breed." I just feel like a...rare specimen; there never were many of us, but we stick around
Mostly I feel this way because I am fairly asexual. I'm not a romantic, and I'm not very interested in sex. My ideal relationship would basically be a girl who would be my permanent roommate, who would cuddle with me when necessary but who would also be independent and we would give each other space. So...uh, yeah. I guess I don't figure I'll find one of those anytime soon.
Doesn't bother me too much because, as I said, I'm not terribly interested in having a relationship.