1. The first time you have a huge fight, but you aren’t worried about getting broken up with, because you know your relationship is meant to last.
2. The first time you sleep over their house, and don’t feel the need to rush to the bathroom to brush your teeth the moment your eyes pop open, because you’re comfortable kissing them with morning breath.
3. The first time you talk about where you want to live in the future or how many kids you want to have, and...