If you're lucky, college is one long sleepover with your best friend. One long sleepover interrupted by freaking out over exams, eating bad sushi, and laying on the floor trying to convince yourselves to go to the gym.

1. You quote the first half of a Vine and she yells back the second half.

From the bathroom: "Road work ahead?"

From the kitchen, muffled by the dishwasher: "Uh, yeah, I sure hope it does."

2. You share everything from sweatshirts to hair spray to your favorite song.

It's pretty convenient to get ready when the curling iron is already hot, "Forever" by Chris Brown is already queued, and you have double the tops to choose from.

3. You hype each other up before leaving for the day.

Love the fit. Your lashes look so long. How did you get your butt to look like that? How do I get my butt to look like that?

4. You don't go to the bathroom at a party unless it's together.

The most important part of going to the bathroom is taking pictures in the mirror for ten minutes, which you can't do without your roommate. And you can't possibly re-style your hair well enough without another set of hands.

5. You make your Spotify playlists public because you know she'd like them.

Bag playlist, getting ready playlist, chill playlist. You've endured every mood together, and you know all the right songs to get through each one. You can cry together to "All I Want" by Kodaline until you're ready to bump to Offset's "Ric Flair Drip."

6. You goof off together no matter where you are.

The dining hall? The library? The crowded sidewalks of your campus? Anywhere is a perfect spot to laugh so hard you forget other people are around. Except the library, because then you have to try to laugh quieter and that makes it so much harder to stop.

7. You go to Target together for eggs and walk out with a full cart.

You didn't need blowing bubbles, tater tots, or any more Command Strips. But you have them now.

8. You complain about having no money as you walk to Starbucks for $7 coffees.

There's nothing like an iced coffee to help you forget how expensive textbooks are. And since you and your roommate stay up way too late talking, you definitely need that caffeine boost to get through the day.

9. You finish every sentence with "you know what I mean?"

And 9 times out of 10, she does know exactly what you mean.

10. You can't imagine living with anyone else.

If you and your roommate are close, the thought of ever living on your own or with someone else is depressing. Even the summer is too long a time to go without your best friend snoring five feet away from you. But in just a month you'll be back at it like you never left.