If having to obtain permission to wed from a mighty monarch -- or, should the request be denied, having your relationship viewed under the microscope of Parliament -- isn't reason enough not to be jealous of princess brides, how about the now-dated practice of arranged marriages? When a princess declared "till death do us part" to someone who was decided for her? It used to be standard practice.
The old aristocracies and monarchies used to swap around pureblooded progeny all the time, forming alliances and developing diplomatic ties, creating intricate webs among the various ruling families. And it certainly wasn't a hard-and-fast requirement for the two parts of a future couple to like, or even actually know each other, prior to their engagement.