I am fine with never marrying the prince, cos then she'd have to be Queen, and fuck that for a game of soldiers...!
But...
Really...
I do appreciate that he's making the effort to be a good friend; he is plainly considering courting her, but he is just making sure to not pressure her, he's not complaining about how he's A Nice Guy, and he now simply seems mildly exasperated when he knows she's plotting something.
Most importantly, he is treating her Like An Equal, and he isn't threatened by the fact that she has more "power" than him.
And THAT.... that makes him head and shoulders above at least 85-90% of all men I have ever met; and that's pretty okay. It's at least okay-ish.
So... more dungeons, more dragons, and more Sylvi... and maybe the occasional prince is okay.
... ish.