what's the real problem, Labels or expectations ?

I thought that labels ruin our relationships no matter what it is friendship, relationship or any bond. And that is the reason why relations start to fade away. When two people are with each, in the beginning they enjoy each others company, they have fun, the live, they laugh and all but as the grow closer they start to name their relation and thats where most people go wrong. Because when they are with each other they love each other without any obligations, without any rules or worries but just as they become something they bring out a long list of wha to do and what not to do and then they want other person to be all check marked on that list and thats where they start judging each other, criticizing each other and blame, doubt, sadness, hurt, all this come in and slowly they start to forget why they liked each other, the list of “perfect person” become so much involved in their brain that it surpasses their heart and the love they had got buried away somewhere and they start to drift apart. And this same rule applies to every relation in the world even if its parental, platonic or romantic. 

but truth is this that:

"Labels aren’t always the problem—it’s what we attach to them."