"Mistakes have consequences, but they shouldn’t tank our joy for each other in the long run."
This is not to say that we are a perfect couple without tensions or problems—making a memory doesn't solve everything. But it does redirect the frustration from one another onto getting through the unpleasantness at hand. This is true even when someone is "at fault."
I didn't write this but assume most couple who learn to live together get this. The bad times will come and you can either work them out together or tear up the relationship.