I don't really understand why you would want her to get back together with the one who betrayed her even tho he knew her since childhood, he was happy to have her be left with nothing.
The only reason she is living well right now is because she made sure she had something after she was outcasted. The fact that he actually had some affection for her IS what makes it worse, not better. After all, if he had hated or been indifferent to her, it wouldn't have been a betrayal, just a break in contract.
Do think about it, can anything be expected from a person who throws away the one they 'loved' and swore would be treated well after they burn their present and future? Can there be forgiveness for someone who makes such a transgression?
What he did would have essentially killed her had she been an actual noble lady. Not to forget he KNEW the general gist of her family life, and still he left her to rot.
And the way he left her, made her out to be the bad guy when he's the one who cheated.
It doesn't really matter that he had some affection for her when he treated her that way. You don't act like that to people you know and love. You don't cut them off based on the words of a person you met yesterday when you knew them for 15 years, knowing what you're doing will have them on the streets as soon as dawn breaks.
Really, if that's what he does to his friend and fiance i'd hate to see what he does to people he doesn't care about, or those he dislikes.
In the novel, the boy doesn't even care she's gone! He was forced by his father and best friend to find her. The best friend (who's been in love with her but gave up) and cousin told him off, saying he went to far to publicly humiliate her like that and the son of a gun didn't feel any remorse. I wanted to punch him so bad!! (╬￣皿￣)
Later, he even comes back ONLY because he knows Misano wouldn't make for a good queen (still loves her too *gag*) and fully expects our baby girl to accept him! Begone you thot!
Part of me kind wishes she would get back together with her fiance. It seems like he genuinely loved and cared about her, and the protag gives me vibes that he was under a love portion. I know from spoilers that probably didn't happen, but otherwise his character just doesn't make sense. Like "oh, I really love and care about my fiance and the model of a prince, but this random chick walks in and suddenly I forget my entire personality. " I guess you can chalk it up to lust makes you stupid, but it seems so out of character.