Unfortunately, the eternality of the “in love” experience is fiction, not fact.
Dr. Dorothy Tennov, a psychologist, has done long-range studies on the in-love phenomenon. After studying scores of couples, she concluded that the average life span of a romantic obsession is two years. If it is a secretive love affair, it may last a little longer. Eventually, however, we all descend from the clouds and plant our feet on earth again. Our eyes are opened, and we see the warts of the other person. We recognize that some of his/her personality traits are actually irritating. Her behavior patterns are annoying. He has the capacity for hurt and anger, perhaps even harsh words and critical judgments. Those little traits that we overlooked when we were in love now become huge mountains. We remember Mother’s words and ask ourselves, How could I have been so foolish? Welcome to the real world of marriage, where hairs are always on the sink and little white spots cover the mirror, where arguments center on which way the toilet paper comes off and whether the lid should be up or down. It is a world where shoes do not walk to the closet and drawers do not close themselves, where coats do not like hangers and socks go AWOL during laundry. In this world, a look can hurt and a word can crush. Intimate lovers can become enemies, and marriage a battlefield.
— The 5 Love Languages (Gary Chapman), Loc. 264–73
Love lasts two years, isn’t it?