I don't think that's the way he thought, we got to hear him a bit in the beginning. It was more like "that girl saved my father so I feel like I owe her a lot and I want to repay her. Dating me will make my father's savior happy? Ok let's do it then" he also had his father and sister encouraging him to marry her so he just went with the flow.
I don't think he's a bad person
Well it's not about him being a good or a bad person (In fact, I appreciate his moderate personality). He is narcissistic and nobody can change my mind on this. Like the FL said, he is just kind on the surface to everyone but truthfully he doesn't care about any of them. Thinking you can repay someone by allowing them to date you ?? Not only this poor girl though that his feeling were romantic when they were platonic during YEARS thinking about mariage and such. He basically saw her as a sister, a "family", not a romantic partner. And he has such a high esteem of him that the price of saving his dad is to be in couple with her. Well maybe he though that was the only thing he could gave her at this time but still it bugs me. Well anyways, I don't hold grudge against him, the FL still have affection toward him since he didn't do anything appart not being in that kind of love with her. I just don't want them to date again, their breakup was the best thing that could happens. They could have a faily relationship or be friend... That fact that he contacted her again to take her back bothers me but I know the author will not do that
Ex-boyfriend were like "oh you saved my father ? Then I will grant you the great privilege of dating me since you already like me" What a narcissistic behaviour...