By age 16, relationships last an average of two years, writes Fogarty. Most long-term relationships do not occur early, and during the teen years, you are likely to see group dating, according to Melanie Greenberg, Ph. D., in the article titled The Neuroscience of Relationship Breakups, in Psychology Today.

How long do adolescent relationships last?

The average duration of adolescent romantic relationships increases throughout the teen years. By age 16 youth report that relationships typically last for six months, and by 18 relationships often last a year or more, with black teens sustaining longer relationships than other racial or ethnic groups.

Does high school relationships last?

The majority of the time, high school relationships do not last, as only two percent of new marriages in North America are compromised of “high school sweethearts.” But the fact that these relationships do not last until marriage in no sense means that they do not teach those involved valuable lessons.