According to the National Institutes of Health, teenagers 16 years old to 18 years old have relationships that last 1.8 years.
How long do teenage relationships last on average?
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.
Can true love happen 18?
And though for most people it happens young, its certainly not true for everyone. They found 55 percent of people fall in love for the first time between the ages of 15 and 18. So its more than half, but that means 45 percent of people still havent been in love when they enter college.