1. You Always like each other's Instagram posts.

2. If one of you hates someone, then you both hate them.

3. You never go to Target without asking them if they also want to go.

4. Their closet is your closet.

5. If a boy that you like texts you, you screen shot and send it to them ASAP.

6. If a boy you don't like texts you, you screen shot and sent it to them ASAP.

7. You never reply to a text from a boy without consulting your BFF.

8. You always tell them when their hair looks like crap.

9. You always, always pick up the phone for them no matter how much you hate talking on the phone.

10. When you order Chinese food you always order enough for two.

11. You tag them in at least two relevant memes a day.

12. When you hook up with a new boy, they're the first person you tell all the juicy details to.

13. When your ex posts anything about their new girlfriend on social media, you and your BFF play " Horse or GF."

14. You have endless amounts of embarrassing photos of them but you would never post them on social media unless it was their birthday.

15. You always have each other's back no matter what.