Most conflicts between partners do not come from having different opinions, they come from how that difference gets expressed.
Effective communication starts with one simple shift, using I language instead of you language. Instead of saying you never listen to me, try saying I feel unheard when this happens. The difference is significant, the first blames, the second shares a feeling.
Another essential skill is active listening, listening not just to respond, but to truly understand. Repeating back what you heard in your own words before replying helps the other person feel understood, and that alone prevents most misunderstandings.
Once a week, having one conversation without criticism and without getting defensive can make a real difference in the quality of the relationship.