I have been married for 24 years and it's been a mostly happy marriage. I also do consider my wife to be my best friend. But it's silly to think that you will come home every day and be happy about dealing with another human, no matter who they are. Sometimes I will come home or my wife will come home and I won't want to be around her because I won't want to be around anyone. That's just how life is. My wife is cool with it and I'm cool with when she wants the same.