Hello Chanida,
All Royals are bound to wedlock within pre screened royalty. I believe the only one (if he ever gets married) to defy this system will be Prince Azim. Everyone else lacks the courage to defy the system and follow their heart...
Take a look at the Princesses (HM's daughters) and others. They are all presented with a choice but the choice is pre arranged!
. I'd like to tell you a little bit about the protocols. In Brunei, adherence to the customs and traditions are what makes one `a Bruneian', thus the protocols must be followed to a capital T. There is also a national philosophy- Melayu Islam Beraja (translated as Malay Islam Monarchy) that's being instilled into the lives of each Bruneian (a hidden blessing!). Interesting, isn't it, as not many countries in the world have such one-of-a-kind philosophy!