Well, you could try doing things he likes together to strengthen the bond. Also, showing appreciation and support for him can go a long way. Sometimes, small gestures of love and care can make a big difference.
One way could be to have heart-to-heart conversations regularly, listen to his perspective, and work on resolving any conflicts together. Surprising him with small gestures of love and support might also make a difference.
To win over your husband in a manhwa, first, focus on building trust. Be supportive of his dreams and hobbies. And don't forget to show appreciation for the things he does for you.
You could start by having an honest conversation with him and expressing your feelings. Maybe try to figure out what went wrong and work on changing those things.