we try to communicate more openly and honestly with each other

I think this is the key to having a good relationship with another person, and it works with all kinds of relationships, whether romantic, friendship, or simply work-related. And I agree with you, I think that the "willingness to compromise" also plays an important role. Of course, a solution will not always be found, and it is okay to agree to disagree, but even then an agreement can be reached and all the people involved are respected.