How much do men change after marriage?

Me and my guy have dated for almost 3 months now. It seems like he gets more flirtacious, attentive, and affectionate with me the more we have been together. He even has done little things that I didn't expect like getting me roses for every month we've been together and just recently took me to an aquarium, a concert, and a zoo in a two day period (a vacation he called it) and got a hotel with a jaccuzzi in it. If a man is like this when dating, does it usually carry on into marriage or does it usually stop?