Let’s get to the topic about Love. According to the Erikson's theory, you can say that I am in young adulthood stage now (approximately between the age of 20 and 30). Before the twentieth century, there were only three stages of life, such as child, adult and old adult .Contemporary society has a variety of markers, such as early childhood, middle adulthood, and late adulthood. As life expectancy began to lengthen, the term "young adulthood" happened to enter into the dictionary. Anyway, Erikson states that it's time for us to achieve the crisis of intimacy Vs isolation in order to move on to the middle adulthood. The virtue is "LOVE”. We are at risk of achieving young adulthood stage which is the stage of committing into intimate relationship .Here is where the question come .Why do we need to commit into the relationship? Most people like love stories, including their own. Love, to some people is addiction. For others it's a fantasy, in which one person expects to be saved by a knight in shining armor. Still others think of love as a game or a war with a winner and loser. Love can be a horror story or a mystery, isn't it? Anyway those are just an example, we cannot really define love. Let back to the point about how to commit into the relationship. According to the Psychosocial researchers, Sternberg formed this theory called”TRIANGULAR SUB THEORY OF LOVE", which is the balancing the three elements of intimacy, passion and commitment.
Here is a picture which I just post above. So you can make sure which pattern of love you are in and I hope all my friends have balanced these three elements and formed a good relationship with your loved one if you have one.

Refer from
2008 Edition , Exploring lifespan development / Laura E. Berk.
Edit by Shi Yi