1. You walk into each other's houses like they're your own

You know you're completely comfortable with your boyfriend/girlfriend when you can just walk into each other's houses without knocking, texting, or calling.

2. You share almost everything

From food to drinks to clothes to deodorant, you share just about everything without ever thinking twice about it.

3. You fart in front of each other like it's nothing

Farting in front of each other has not just become a norm, but a competition.

4. You can wake up next to each other not caring what you look like or about each other's morning breath

You've been together long enough now and had enough sleepovers for you feel completely comfortable waking up the next morning next to each other looking like a zombie out of The Walking Dead.

5. You can go to the bathroom in front of each other

When one of you is peeing, or even pooping, the other has no problem walking right into the bathroom to get ready or to brush their teeth.

6. You can always trust each other

You truly feel as if you can go to one another with anything and everything and that the other will understand completely with no judgments, just an open mind and heart.