My Bodyguard Boyfriend Is the Creator

Transported into a city-building conquest game, I became the exiled princess character. The clear condition is to become the queen of a nation. What have I got to be afraid of? My secret guard boyfriend has connections everywhere, plans everything, knows every plot point, and can take down every boss. He can ride horses and sail ships, cook in the kitchen and hold his own in a formal hall, and he's the ultimate must-have for home or travel... But here's the problem: how can I bear to leave him behind after I clear the game?