Even in a healthy relationship arguments will happen because we all come from different family backgrounds and have different family traditions, life experience and opinions. Because we respect each other, we sort out arguments by coming to a solution that we are both happy with.
No one is right or wrong all the time, and in a healthy relationship mistakes are acknowledged and accepted.
For a relationship to be healthy, both of you need to believe in it and actively be helping to build it up.
In a healthy relationship the goal is for both partners to win.