I have never been in a relationship so I don't have experience with that but, I can feel that my brother is not happy in his marriage. I see him having the same attitutes I used to have when I was feeling tired of something like a boring course, for example. Or some of my family members. I know that it's normal to have arguments in any relationship but the way he always seem so... Tired and lifeless is something I can't ignore. I think he simply doesn't want to admit it.