When having sisters you know all too well what it's like to compare yourself to them. You get upset over small things like how they look in a dress you know would awful on you. Or how they look awesome in a picture but you look like a potato. We're all guilty of it.
I have one younger sister who is probably one of the prettiest girls you'll ever see, and then there's me. Even in the clothes she wears on her "lazy days," next to her I look like a man. It's annoying.
Being the "ugly sister" is a blessing and a curse. It really depends on how you look at it. For me, it depends on the day.
Now you're probably thinking, "How could being ugly be a blessing?" Well for me it is when guys my age hit on my little sister. (Keep in mind she's 16 and I'm almost 21.) "Hey who's that hot chick in your snap story?!" That's when big sister mode kicks in. "Oh, you mean my 16-YEAR-OLD sister." Most stop after that, but a few keep asking for her number or snapchat. And after about the second question is when I get mean and they back off. So if being ugly and threatening means I protect my sister from douche bags, then I'm okay with it.
The curse part sometimes over powers the capability of making guys back up and think about their recent life choices. You don't really notice until you start looking at pictures from family gatherings, or selfies you guys have taken. It kinda hits you, and then you start to notice all the guys looking at her when you're at the mall.
If you're anything like me, it will hurt. To sit there and think that you're the ugly one out of the two of you. But I promise you, it's not that one is ugly than the other. Your perspectives are different. Where you think she looks better in something, she thinks the same thing. That dress you're wearing, she might wish she can rock it like you do. She's seeing guys look at you when you're watching guys do the same thing to her.
You are two different people, not one is uglier than the other.