Show some more remorse!
I know they had that whole part of the movie when Buddy becomes an alcoholic and is losing it.. but when he starts the relationship with Abbey.. you can't help but hate him for keeping that secret for her. They should have shown him going through more torment hiding this secret when starting a relationship with her.
Maybe I'm the only one, but I kind of didn't want the two of them to end up together in the end. But you know they had to.