For those of you out there that have at least one sister, you know what it's like to be in constant fights over boys, clothes, friends, who's turn it is to clean the bathroom, and many other pointless disagreements. Although you may want to rip each other's heads off about 70% of the time, the other 30% of the time in which you both aren't trying to give each other black eyes is when you're a team. You both have each other's backs no matter what happens, and you take on every problem together. Your sister is and will always be your best friend through it all, even if you think you fight more than you get along.

1. She will do wrong to whoever has done you wrong.

Did a close friend stab you in the back? Did a dumb boy send you a nasty message? Your sister's on your side. Leave it up to her to give your friend some tough love and tell that person that he/she just lost a great friend. Leave it up to her to send that boy an even nastier message, one that will make him never want to mess with you again. She'll always assure you that you don't deserve any wrong doing, even if she doesn't directly say it to you. She'll let everyone know that she's the only one that can mess with you, which in a way is peculiarly satisfying.

2. She'll always want to hang out with you.

Okay, maybe not always. However, if you can't get your friends or your boyfriend to go to a concert or go on a crazy adventure with you, your sister is the perfect alternative. She'll be there with you to sing all the words to your favorite song, even if she has to fake it because her taste is music is completely on the other end of the spectrum. She'll be there with you when you spontaneously decide to ditch school and go on a road trip, or even just to the mall. She'll be there to buy you food, even when you have to beg her to for 20 minutes straight. Anytime spent with your sister is a lively experience.

3. She'll make sure you don't make yourself look stupid.

Ridiculous outfit? Are your pants see through? Not sure whether or not to double-text a boy? Your sister will tell you. Most of the time she won't sugarcoat it either. Although it may seem like she's being harsh or snide, she's normally right. You'll thank her later, trust me.

4. She appreciates you the most.

She'll always be there to let you know awesome you are, although most of the time she does it indirectly. She'll probably never tell you that she's proud of everything you've accomplished or that she's proud to be your sister, but she shows it in the way she expresses herself. Whether she shows it or not, she'll always be the person that wishes the best for you, and will always be your #1 supporter.

5. You'll always have her.

No matter what happens, your sister will always be your sister. She'll always be in your heart, and you'll always be in hers. You both have watched each other grow up and mature through life; no one will be closer to you than your sister is. Even if you spend years apart, once you see your sister, it'll seem as if you haven't even spent a day apart. She's your biggest blessing and will never give up on you.