What was the lifespan of these improbable loves? An hour. A week. A few months at best. The end was a natural thing, like the seasons, like getting older, fruit turning. That was the saddest part — there was no one to blame and no way to reverse

We have been led to believe that if we are really in love, it will last forever. We will always have the wonderful feelings that we have at this moment. Nothing could ever come between us. Nothing will ever overcome our love for each other. [..] Unfortunately, the eternality of the in-love experience is fiction, not fact. The late psychologist Dr. Dorothy Tennov conducted 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.

"Being in love is an emotional and obsessive experience. However, emotions change and obsessions fade. Research indicates that the average life span of the "in love" obsession is two years. For some it may last a bit longer; for some, a bit less. But the average is two years. Then we come down off the emotional high and those aspects of life that we disregarded in our euphoria begin to become important. Our differences begin to emerge and we often find ourselves arguing with the person whom we once though to be perfect. We have now discovered for ourselves that being in love is not the foundation for a happy marriage."

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.

We have this idea that love is supposed to last forever. But love isn't like that. It's a free-flowing energy that comes and goes when it pleases. Sometimes it stays for life; other times it stays for a second, a day, a month, or a year. So don't fear love when it comes simply because it makes you vulnerable. But don't be surprised when it leaves, either. Just be glad you had the opportunity to experience it.

When a person falls in love what he or she certainly feels is ‘I love him’ or ‘I love her.’ But two problems are immediately apparent. The first is that the experience of falling in love is specifically a sex-linked erotic experience. We do not fall in love with our children even though we may love them very deeply. We do not fall in love with our friends of the same sex – unless we are homosexually oriented – even though we may care for them greatly. We fall in love only when we are consciously or unconsciously sexually motivated. The second problem is that the experience of falling in love is invariably temporary. No matter whom we fall in love with, we sooner or later fall out of love if the relationship continues long enough. This is not to say that we invariably cease loving the person with whom we fell in love. But it is to say that the feeling of ecstatic lovingness that characterizes the experience of falling in love always passes. The honeymoon always ends. The bloom of romance always fades.

Being in love is a good thing, but it is not the best thing. There are many things below it, but there are also things above it. You cannot make it the basis of a whole life. It is a noble feeling, but it is still a feeling. Now no feeling can be relied on to last in its full intensity, or even to last at all. Knowledge can last, principles can last, habits can last but feelings come and go. And in fact, whatever people say, the state called ‘being in love’ usually does not last. If the old fairy-tale ending ‘They lived happily ever after’ is taken to mean ‘They felt for the next fifty years exactly as they felt the day before they were married,’ then it says what probably never was nor ever would be true, and would be highly undesirable if it were. Who could bear to live in that excitement for even five years? What would become of your work, your appetite, your sleep, your friendships? But, of course, ceasing to be ‘in love’ need not mean ceasing to love. Love in this second sense — love as distinct from ‘being in love’ — is not merely a feeling. It is a deep unity, maintained by the will and deliberately strengthened by habit; reinforced by (in Christian marriages) the grace which both partners ask, and receive, from God. They can have this love for each other even at those moments when they do not like each other; as you love yourself even when you do not like yourself. They can retain this love even when each would easily, if they allowed themselves, be ‘in love’ with someone else. ‘Being in love’ first moved them to promise fidelity: this quieter love enables them to keep the promise. it is on this love that the engine of marriage is run: being in love was the explosion that started it.

"Of all the misconceptions about love the most powerful and pervasive is the belief that "falling in love" is love or at least one of the manifestations of love. It is a potent misconception, because falling in love is subjectively experienced in a very powerful fashion as an experience of love. When a person falls in love what he or she certainly feels is "I love him" or "I love her."
But two problems are immediately apparent. The first is that the experience of falling in love is specifically a sex-linked erotic experience. We do not fall in love with our children even though we may love them very deeply. We do not fall in love with our friends of the same sex-unless we are homosexually oriented-even though we may care for them greatly. We fall in love only when we are consciously or unconsciously sexually motivated. The second problem is that the experience of falling in love is invariably temporary. No matter whom we fall in love with, we sooner or later fall out of love if the relationship continues long enough. This is not to say that we invariably cease loving the person with whom we fell in love. But it is to say that the feeling of ecstatic lovingness that characterizes the experience of falling in love always passes. The honeymoon always ends. The bloom of romance always fades."

Q: Did he think that love could last forever? A: Well, no, but the limits to eternity didn’t lie specifically with love. They lay in the general difficulty of maintaining an appreciative relationship with anything or anyone that was always around.

Falling in love can be likened to someone, falling from a high building. The possible result will be unconsciousness if not death. Take it that, anybody that falls in love is either unconscious or dead.

We fall in love because we long to escape from ourselves with someone as beautiful, intelligent, and witty as we are ugly, stupid, and dull. But what if such a perfect being should one day turn around and decide they will love us back? We can only be somewhat shocked-how can they be as wonderful as we had hoped when they have the bad taste to approve of someone like us?

One does not fall in love by exercise of reason and good taste; one simply falls, and invents ingenious reasons afterwards. One falls in love with one’s fatality, whether it be a woman or a city.

When you love someone, it is hard to fall out. You cannot fall in love today and fall out of love tomorrow. Love is strong. Before you tell somebody you love him, you have to be sure.

...some claim that one is only ever really in love once in a lifetime, others that it is better the second time around, others that the first time is the only genuine manifestation, still others that they fall in love every week or even every day.