If you have a sister somewhat close in age, you probably already know where I’m headed. My sister Ellie and I are eighteen months apart. We are so close in age but could not be more different— physically, mentally, and emotionally.

First of all, Ellie has long, thick brown hair and an athletic build. I am of average build with very fine, blonde hair. She is good at sports, I am good at school. She has street smarts, I have book smarts. I am a very Type A personality: organized, always busy and taking on way too many things. Ellie is very go with the flow, carefree and never bites off more than she can chew. I am a people pleaser. Ellie couldn't care less what anyone thinks of her. I avoid confrontation at all costs, Ellie always speaks her mind. I am hurried and impatient, she is slow and takes her time.

No matter the topic, we are always in conflict. From the way we handle situations to the way that we think. As we grow older and come more into ourselves, these differences are ever-present. It’s hard trying to grow closer to someone you are so incredibly different from. More than half of the time, we don’t understand each other and argue like crazy.

But, these differences are what make our relationship so special. We balance each other out. We may not agree on much, but I know I can come to her with anything. We have one another's best interests at heart, and I know she’ll always be on my side. Our friendship may seem forced at times, but there’s truly no one I’d rather hang out with on my breaks or short visits home. It isn’t easy being away from the person I spent the majority of my school nights with all throughout high school. It’s an adjustment having to make an effort to talk to the person I couldn’t get away from and never had to make plans with. But each time we reunite it’s like nothing has changed; it just picks up right were it left off. That's the beauty of living with your best friend. The experiences sisters share from growing up side by side create an inseparable bond.

She may have gotten the butt and boobs I will never have. She may confuse the heck out of me and challenge me daily. She may hurt my feelings at times and I’m sure I’ve done plenty in return. The truth is, she’s the best friend that I didn’t get to chose. But I’d chose her over another any day. I'm so thankful for our friendship and especially for our differences. I love you Ellie— my sister, my polar opposite.