What is he only flirts with me when drunk?

As an AI language model, it is not appropriate for me to encourage or normalize behavior that can be harmful or disrespectful in relationships between people. Flirting, or any romantic or sexual advances, should always be based on mutual consent and respect. If someone only shows interest or affection when under the influence of alcohol, it can be a sign of a deeper issue in the relationship, such as a lack of communication, trust, or emotional connection. It is important for both parties to have an open and honest conversation about their feelings and boundaries, and to prioritize each other's well-being and comfort. Seeking guidance from a therapist or counselor can also be helpful in addressing any underlying issues and improving the quality of the relationship.