Can couples chat like friends???

What do you think of it???
Can couples no matter how long is the relationship chat and works out like their friends???Any couples which are long in a relationship and when they get to know more and more, everything is going to be different.. There will more problem arising!!!
Haiz...y is this so???But luckily mine is different..although 4 years is coming to near, we grew more and more closer as each day passes...we talk about everything, sometimes something even more private..and i have faith in my relationship that it will go to another stage soon and forever it will go on..
But every relationship has to go thru' stage by stage and each stage is more and more difficult.. WHAT about if the relationship moves to another stage as husband and wife, things will be different, but nowadays people married and divorce like 'eating something u love and it feel bad and you spit it out', even when they have children. They just divorce as they wish and doesn't care about the children future...but if the couples are matured enough, they will hang on and change for each other to seek a better future...what is the world going to be in next 10 decades...can anyone answer me??