1. You've both forgotten what personal space is.
2. You share almost everything.
3. You can talk for hours...
4. ...but sometimes, you don't need to say anything at all.
5. You sometimes get confused for a couple.
6. You know what your friend is going to say before they do.
7. You're not afraid to be honest with each other...
8. ...but you'll always let them know how great they are.
9. You know more about their relationships than they do.
10. You both know each other's deepest secrets.
11. You feel like you can't survive away from each other...
12. ...but if you have to be, when you meet again it's like you never left.
13. You know each other's relatives as well as you know your own.
14. You've thought about getting tattoos together.
15. You've seen each other at your best, and at your worst...
16. ...and you still think your BFF is perfect.
17. Basically, you know you're each other's soulmate.
This post was created by a member of BuzzFeed Community, where anyone can post awesome lists and creations. Learn more or post your buzz!