I can certainly provide some general advice that might be helpful to someone in this situation, based on professional recommendations and best practices:
Education: Learn as much as you can about addiction. Understanding the complexities of this disease can help you understand what your partner is experiencing.
Empathy and Compassion: Remember that your partner is dealing with a serious illness. Avoid blaming, shaming, or judging them for their substance use.
Encourage Treatment: If your partner isn't already receiving professional help, encourage them to do so. Treatment might involve detoxification, medication, therapy, self-help groups, and more.
Support, Don't Enable: It's crucial to support your partner's recovery efforts without enabling their addiction. Enabling often involves protecting the person with the addiction from the consequences of their actions.
Self-Care: Living with someone who has a substance use disorder can be stressful and emotionally draining. Take time for your own self-care, and consider seeking support for yourself, such as through therapy or support groups.
Set Boundaries: Decide what behavior you will accept from your partner and what you won't. Make sure to clearly communicate these boundaries to your partner and stay consistent in enforcing them.
Professional Help: Consider seeking help from a therapist or counselor, either individually or as a couple. They can provide strategies and techniques to cope with the addiction and to communicate effectively.
Remember, every situation is unique, and what works for one person might not work for another. It's crucial to seek professional guidance to navigate through these difficult circumstances.