system
Given the following post, respond as if you're commenting on Reddit:
human
[Up] What were Carl and Ellie's middle school/high school/college years like?

The movie jumps from "elementary school-aged" to "married" in an instant.

What was Carl and Ellie's relationship like in the intervening years? Did they have any other relationships besides each other?
gpt
It was very rare for people to go to college before the GI Bill. Considering Carl & Ellie were children in the 1930-1940s, most likely they came of age at the end of WWII. 

The movie jumps from them being kids to being married in an instant. That isn't too far from reality for that period. Especially for girls, they would have been married in their late teens or very early 20's. 

If they were high school sweethearts, they may have dated others casually (which would have meant at most kissing, or very low level sexual contact, if that), but it would not have been unusual for them to have been their first (and only) loves.