There's a difference between calling your significant other your "best friend" and actually having them be your best friend. This kind of relationship is truly once in a lifetime. If you're lucky enough have someone like this, do yourself a favor and cherish them forever. After all, what's cooler than getting to kiss your best friend for the rest of your life? Below are 25 signs that the person who you're dating is truly your best friend.

1. The excited feeling that usually only lasts during the beginning of a relationship hasn't died out and it is even stronger than it was then.

2. You tell each other literally everything, so trying to keep a secret and surprise them drives you crazy.

3. Even if you've just spent the last 48 hours with each other, you can't help but miss them as soon as they leave.

4. You don't have to subconsciously think about what to say or do when with them, everything feels natural and comfortable.

5. No matter how busy either of you are, you always make time for one another.

6. You are so proud of their accomplishments that you brag about them as if they were your own.

7. You know exactly what to order for them when you're out to eat.

8. They somehow make you brave enough to do things that you would have otherwise been too scared to do.

9. You become interested in things that you never used to care about just because they're interested in them.

10. You can do nothing together and still have the time of your life.

11. A night in somehow always turns into a massage session.

12. You can openly talk about your flaws with them and you don't even feel insecure about these flaws.

13. Whether it's a game of charades or trying to figure out which way the GPS is "clearly" telling you to go, the two of you make a great team.

14. You laugh about things that make absolutely no sense and that sound completely crazy to other people.

15. Even when attractive people walk by, you don't feel threatened. You may even point out how "hot" they are.

16. They always know when something is wrong, even if you are hiding it.

17. All of your favorite memories involve them.

18. "Netflix and chill" literally means "Netflix and chill."

19. Nothing is quite as fun unless they're there.

20. You sing together at the top of your lungs and for songs that are duets, you break the parts up and nail them every time.

21. When you have a bad day, they're the first person who you want to talk to and the only one who can really make you feel better.

22. You tease and make fun of each other, but only out of love.

23. You can openly talk about your past relationships because you both know that you are each other's future.

24. You make plans weeks, months, and even years in advance because you know that they will still be there.

25. You absolutely cannot imagine life without them.