I think 2 people in a deep relationship do get "molded" into a third entity, where there is a harmony made of points of weakness and points of strength of each of the 2. I can only see it when there are good intentions and honesty on both parts though. Intention/honesty is important to me, the same action is different if performed with good or bad intentions or laziness (we sometimes focus on what a person does, if the question is WHY he does that, not why in our opinion but why in HIS mind he does that, we often get to know important elements on the sense of a relationship).
As long as you always let a person/man how you feel in some specific circumstances, no matter how obvious it seems to you, that person should get to know you and react getting closer to you with actions. If people "slightly mold" each other (not their principles, not their personalities, but just simple actions) to become both better persons and together a great couple, why not.
The thing with "molding" is: how? It shouldn't be a painful or humiliating process, it should be made with love and good intentions, and it should bring both to a happier place. I think when you feel no patience, in some kind of way you feel like something is already missing and the effort of "explaining" won't change things.