Is your life really over after marriage?

I know that you're supposed to truly be in love and everything, but once you get married, is it really any fun anymore? You only talk about one person, and think about one person, and dance with one person and kiss them and be in bed with them...After a while, doesn't it get kind of boring? I don't want to be in a bickering and nagging relationship like my parents. Will someone who has experience please tell me, honestly?