We have never been together again. Still, there were many teens who believed summer romance could become long-term. You get mad, you scream, you can hate them for a week, but that isn't a reason to give it up, it's a reason to work on your problems and only grow closer. If it is a true relationship with both people liking or loving each other then it will end whenever one or the other feels they have grown apart. Then when you get back to the real world it's over.
Summer romances are the same as any other romance.
Real relationships last through spring, summer, fall and winter all.