The Selfish Romance - Chapter 47

I don’t understand why he doesn’t just tell his dad that he’s not romantically interested in her? Why is the dad so insistent that she marry into the family to “pay her back” for calling the squad/ saving his life? I mean yeah it was obvious that she was in love with him back then, but they tried a relationship & it didn’t work. Hopefully she can talk to the dad & he’ll let this whole thing go