I Don't Know if Marriage Ruins Relationships

I wonder if marriage ruins the excitement in the like love for the other person. I don't know because I've never seen a marriage where the two people were like still in love with each other like 30 years later. Maybe there's just none of that in my family. And maybe that's just because my parents did get divorced, so I kind of feel like divorce is inevitable. But then again, I think marriage is mainly necessary for your child. Because it makes your child feel like they have a family in a sense like a tight knit family. It might be the point of it. So I don't even know and I need to start knowing soon within the next seven years or some