I hope she doesn't end up with Louie either. If she does then reading this novel would have been a waste of my time.
the point that is against Louie is he physically abused her. It is never justified to hit her. He knew she loved him and at that time he loved Sofia, what gives him the right to even have sex with her while he claims to be in love with Sofia. This just proves that he is not worth her love. He is trash.