1. You have her name saved in your phone with emojis that represent her, or a special text tone.

2. Your closet is her closet and vice versa.

3. The most fun you have is when you're together. Who knew going to Target could leave you with tears and a six-pack?

4. You guys don't like the same people. You're looking out for one another.

5. You refer to each other's ex's by nicknames.

6. You have telepathy, and it's no joke. You can be thinking about it, and next thing you know, she says it.

7. Spending a Friday night in with Chinese food and Netflix is considered normal.

8. You know each other's coffee orders by heart.

9. You don't owe each other money, because it will find its way back.

10. You have the same sense of humor.

11. You know when she is upset or mad just by the way she's texting you back.

12. She knows when to call you out, when to let you cry it out, and when to bring you a surprise.

13. A potential boy isn't approved until she says so.

14. You are both geniuses when it comes to Facebook creeping.

15. Wine nights are normal. So are the empty bottles left behind the living room couch.

16. You take turns being the mom. You'll hold her hair back when she's had too much to drink, and she'll bring you tea when you're sick.

17. As much as she hates how tone deaf you are, she will let you sing.

18. You don't show up to a party without her, and no one expects you not to; you're a package deal.

19. Somehow, you don't get sick of her. And people wonder how that's possible.

20. She's your study buddy and library date, no questions asked.

21. You are each other's fashion consultant, and you know she'll be straight up about it.

22. You know everything about each other.

23. You have embarrassing screenshots of her to post for weekly #womancrushwednesday posts.

24. You can always count on her to like your Instagram pictures and share your Facebook posts.

25. She's one of the greatest things to happen to you in college, a blessing disguised as a best friend and roommate.