9) You tease each other.
You can laugh and make fun of each other in ways other people can’t. This comes from both a sense of security as well as the understanding that you don’t have to be walking on eggshells with them all the time. You know when it’s time to let loose, and you are comfortable enough with them to let them see.
10) They’ve made you a better person.
The people who we are affected by the most are the ones who have changed us just by their presence in our lives overhauling everything we thought we knew and wanted. It’s not a bad thing, this is supposed to happen, usually. You need to learn from your relationship.