1. Because you've lived together so long, you know exactly how long each of you can go without showering.
2. You know each other's favourite take away orders.
3. You understand that taking laundry out of the basket to wear before it's been washed is sometimes necessary.
4. You have a system for when you bring people back late at night.
5. And you know which exes they keep crawling back to.
6. You know exactly what your housemate needs when they're drunk.
7. And you know what horrendous combination of foods will cure their hangover.
8. You also know how to deal with their hangover crises.
9. And you understand the importance of not making any loud noises or sudden movements the morning after a big one.
10. You know just how long your housemate is capable of spending in front of the TV.
11. You know it's your duty to help tidy up every time your housemate's parents spring a surprise visit on you.
12. You share the same taste in getting ready music.
13. You've seen each other naked 100 times, and it bothers you 0%.
14. If one of you goes away for a weekend, you must set aside an evening for analysis.
15. You go through all your most ridiculous fads together.
16. You've thrown some truly excellent house parties in your time.
17. And you've been known to host a fancy dinner party or two.
18. You know exactly how messy each other's rooms can get.
19. You've lived together long enough to know you don't need to ask before borrowing something.
20. You know exactly what picks them up when they're feeling down.
21. And you know that whether you live together forever or not, you guys are always gonna be BFFs.
