The desire for more doesn’t end
First it was establishing you were “boyfriend and girlfriend,” eventually it was moving in together, then it was getting a dog together, and of course getting engaged. Before you were married, there was always some next big step you thought was important. You think that desire for more will stop once you’re married, but it won’t. Next you’ll want to have kids, join groups/organizations with other married couples, start a business with your partner and all other sorts of desires, depending on who you are. It’s in our human nature to always want more.