It's not a matter of preference here, it's a decision between emotional and base desires that crave his presence, his voice, him, every ounce down to even his temper-inducing muleheadedness, and rational logic which dictates that breaking apart is necessary sacrifice for the greatest amount of happiness for the most people, necessary for her to uphold her honor and duty flawlessly. These factions make up her entirety, have been at endless conflict since the day of destiny, and over and over she's always chosen the side of "what must be done for the good of all", hasn't she. A slave to correctness. But that doesn't make it her preference.
Truly, her preference would be that there wouldn't be a need to choose in the first place.
But she can't tell him that or explain any of it, it would just burden him, make his own consideration more painful. So standing a little straighter, she balls her fists up tight and forces herself to look up at him evenly, her voice held far too controlled-- but it has to be, because otherwise]
Regardless of whatever mine may be, it is ultimately your decision to make or not... [A pause as she catches herself before the title slips out. No, she decides; instead...]