The percentage of middle school relationships that last the three years until high school is less than ten percent, while eight percent of high school relationships work until marriage, and only five percent of the relationships that are started in high school lead to marriages that do not end in divorce.

What are the chances of marrying your childhood sweetheart?

High school sweethearts that get married while still teenagers only have a 54% chance of having their marriage last 10 years. High school sweethearts that wait until at least the age of 25 to get married have a 10 year success rate of 78%.