I have found this to be true in every relationship: friendships, work relationships, and relationships of all kinds.
We start with niceness, addressing each other by our names when we start. We are nice, and we want to make the other person feel nice. First name is often
As the relationship matures, we get beyond that formality and get to the point – texting at random times, sharing what we want to, and then get back to our own world.
Which to me is a great sense of conviction in that relationship – where you do not want to show to them that you care, you care and we are now nurturing the relationship.
Not doing the “good” things a lot often, because you are now great, is sometimes a huge way of forming trust.