Really there is nothing more to add except maybe, make sure his eyes are always on you and not casing the room looking for his friends or anyone else he knows or might want to know. And of course that goes for the girl as well. If they don’t give their 100 percent undivided attention while dating or through the engagement period, then you will certainly not get it after marriage.
If either party are not acting like they are the luckiest person in the world to have found you, put your thinking cap on and figure out why not.