Look, with the way the story has unfolded so far - Anurag's intention of pushing Prerna off the bridge wasn't to kill her, he just wanted her off Komolika's radar so that Komolika would never be able to harm her. In his own way, he was trying to protect her. He knew what he was doing wasn't right and Prerna probably would forever hate him for that. But he was okay living with her hate, as long as she was alive and out of jail, it would be enough for him to live his life as long as she was alive, so what if they were not together.
He did have measures in place for saving her, now when he comes to know that the his divers were all bought off by Komo and Prerna would have died, if not for Bajaj, that definitely would devastate him and it would be on his soul forever that he had almost killed HIS Prerna and that is a journey that the character of Anurag Basu has to take. Forget anyone else, I think Anurag would probably never forgive himself for that. Did he make a mistake? Absolutely. Can he be redeemed? Probably not. Does that mean that he is a terrible human being and doesn't deserve at all to be with Prerna and have his chance at love? Well, that's for Prerna (and the CVs, I guess) to decide.