Benjamin was your lover.. until the crown prince changed that. The Prince saw you and decided he wanted to make you his bride, and considering his position in society, he could have you without discussion. And that's exactly what he did.

You are soon to be married to the Prince, and Benjamin has even been promoted to Commander... meaning you have to see him more, even if it pained the both of you.

"Sir, the troops have returned." Benjamin spoke to your fiancée, the Prince.