She can't just marry someone else. She was engaged to the King of Severus. She couldn't break off their engagement for someone with a lower title, cause it would be super insulting to that king. She chose Regan cause he's the king's son and unmarried cause of his bad reputation, so the king and her family can give no excuse for giving their blessings.
So why didn't she just marry the king of Severus if anyone would do? Cause she wanted to stay in her home country. She's obviously still in love with Hector (she was watching him through the window, cause he was probably the conductor in the Royal Orchestra in chap11 page16). Not sure if she's gonna act on it or is just satisfied watching from a distance. Either way, Regan is perfect again cause he's a playboy and will probably have affairs during their marriage. So he won't care/can't say anything if she started something with Hector.
Okay so I can understand that the fl is trying to escape from her own (and perhaps another’s) misery, but until I know more about her reason for this she’s ruining someone else’s life for her own happiness. He’s happy living his life the way he is. If the only thing she’s trying to run from is love then why can’t she just marry someone else? Literally every single man in the kingdom wants to marry her. If she can’t take no for an answer then why did she even bother asking in the first place ugh bitch