First of all, you need to understand his feelings. He may feel helpless, depressed or inferior. He may feel that he is not good enough or that he is not good enough for you. These feelings are very real. You need to respect his feelings and help him regain his confidence.
Secondly, you need to establish a safe and supportive environment. He needs to know that he can trust you and that you will support him without criticizing or belittling him. You can tell him that you love him, that you are by his side and that you will always support him. You need to wait patiently and let him decide when he can open his heart to you.
Third, you need to help him find professional help. Boyfriends who are physically abused need professional treatment to help them overcome their inner pain. You can provide contact information, let him see a psychologist or therapist, or make an appointment for him. You can tell him that you understand his feelings and you want him to live a happy life.
Finally, you need to keep yourself healthy and happy. It takes a long time and patience to save an abused boyfriend, which is a long process. In this process, you need to keep yourself healthy and happy, don't pay too much for him, and don't let yourself fall into pain. You need to know your boundaries and keep a proper distance from him, so that you can all live happily.