I’m a bit older than my wife, but your point rings true - we also met fairly young, and went through some stuff. That’s probably a meaningful part of how and why we are who we are.
Meeting my wife fairly young meant that I got the raw, unfiltered version of her feelings and was able to compare/contrast that with my behavior - and improve it. That led to trust allowing discussion of involving others, and an understanding that neither of us is going anywhere / associated trust.