Climbers are just like anyone else who have a passion for a sport, activity, whatever, and have made it a lifestyle.
For me, since I love the sport myself, I think it's best to date a climber. Provided he's not some womanizing jerk, he's probably more down-to-earth and in general, fun to be around than the typical guy.
It's difficult to find females in climbing since it's predominantly male, and as one friend observed, if females are climbing, they are almost always with a boyfriend already. However, I know quite a few single climbing females.
Even if she doesn't climb, there are females out there who are independent and don't mind their men going off for a weekend/week to do their thing. Just hang in there, she'll come along.