He was your knight in shining armor literally. Quackity. He was assigned to protect you. Falling in love was never part of the mission

one peaceful day in the kingdom, the castle was ambushed by the Dream clan

He blew the castle up, killing your parents and everyone in the castle except for you and Quackity, you were badly injured

"Princess?"

He called out, he knew he had to protect you know moe then ever, he loved you but he didn't want to show that, thought it would look weak