When he talks about his family, he is bragging? What does he say about them? Nothing wrong with showing/sharing that he is proud of the family, as long as it’s not bragging about being rich etc.
You havet to talk, text and meet up to get to know the person before marriage…but if you are already bored just from the text, maybe he isn’t the rigth guy for you. You should meet with him first though and see if your mood changes about him.