Navigate what? It seems simple to me - tell him how you feel. Tell him you don't want cut and pasted form messages, that you prefer unique original messages that he takes the time to write just for you, so that you know your are special to him, and if he can't make time for something so easy that is that important to you, then don't bother sending a message at all.
Boom, done. Is there a reason you felt you needed to "navigate" something instead of simply expressing your discomfort?