What does a healthy relationship look like?
Disagreements may still appear even in healthy relationships, and it’s ok, as communication is essentual for a healthy dynamic. However, his approach to disagreements is a secure one: each will share their perspective.
And if feelings were hurt or mistakes were made, he takes accountability for his side, and makes genuine apologies followed by reparations and direct actions (ie. “I’m sorry I did x, I didn’t mean to hurt you. I will be/do y in the future”, and then does as he promised).