The way I think about it is that the core idea is that you will stick together with your partner through everything and grow together. Most high schoolers don’t go in with that idea, they just have strong enough emotional connections that they stumble into that.

The maturity part of being an adult is knowing that’s what you should do and knowing how to do it without hurting the other person in the process.

It’s like dancing. If someone really wants to dance with you, they’ll be patient as you find your rhythm and you both learn to dance. Feet get stepped on but it’s the same dance. Getting older doesn’t teach you to dance. Being young doesn’t mean you aren’t light on your feet. Maturity in relationships is knowing most of the wrong moves and never dropping your partner.