Follow my guide 
After you succesfull confess and make out with her, buy engagement ring from the capital shop then you can marry her. https://forum.choiceofgames.com/t/the-great-tournament-step-by-step-guide-by-xoro/29239
Follow my guide After you succesfull confess and make out with her, buy engagement ring from the capital shop then you can marry her. https://forum.choiceofgames.com/t/the-great-tournament-step-by-step-guide-by-xoro/29239