Since I’m only 16 months older than my younger sister, we spent the first decade of our relationship bickering, thinking that we were arch enemies. However, as the years went on, we realized that there is no way we could possibly live without each other, no matter how annoying the other may get at times. Here are 10 reasons why your sister is your best friend:

1. They know all of your secrets and don’t judge you for any of them.

Well, maybe they judge a little, but they’ll never say so.

2. They’ve been with you for your entire life and they’re not going anywhere anytime soon.

And if you are going somewhere, best believe you’re taking me with you.

3. It’s an unspoken rule to keep everything confidential, a.k.a. parents are left out of the loop when it comes to sisterly gossip.

Gone are the days of blaming your sister for making that mess, just to avoid being yelled at.

4. You have two closets at home and most of the time, they are willing to share.

The keyword in that sentence being most.

5. You have a partner in crime for just about any occasion.

You never have to go to boring family gatherings alone, and you always seem to get into trouble when together.

6. They will love you unconditionally, no matter the situation.

They’ve seen too much to give up on you.

7. They will always support you, whatever you do and wherever you go.

It’s their job to support you--that’s all.

8. She can read your mind with just a glance.

She can also tell what mood you’re in, when you’re hungry, and much more, just by your facial expressions.

9. You have a guaranteed bridesmaid at your wedding.

And she’ll rock it.

10. You will never be alone.

Even on the worst days, you’re never alone because you have your sister. I wouldn’t trade or change my sister for the world. Hopefully, you wouldn't trade or change yours, either.