Long lasted couples

So, every long lasting couples from a year forward... what has died in the relationship ?? Like actions wise.. like what are some things that they don't do as much as they did in the beginning of the relationship, and what are some things they still do?? I just wanna see how y'all are making it bc I'm having a hard time accepting how comfortable my boyfriend is bc I feel like he's so comfortable he doesn't seem like he needs to try anymore bc he has me.