Oh dear. I can completely empathise with you Roselyn. But sadly theres just no point in devaluing yourself because of this perception/ reality. Heres a great comment i found from a guy who was answering a post like yours…..

“It’s very, very rare in life to find a person who has siblings who doesn’t feel inferior to them in one area or another. My ex wife had two sisters, and each of the three of them was convinced, and I mean convinced, that they were both the ugliest and the dumbest sister.

The good news is, there are guys out there who would love to be with you, who would never be interested in your sister. Because you’re what they’re looking for, and because your sister isn’t you. And you’ll find one of them and then alot of these feelings will dissolve.

You’ve got to keep one thing in mind… your sister is one of three billion women in the world, and you’re not in competition with any of them. Between the two of you, she might be the prettier, but between your sister and Angelina Jolie, Angelina is the prettier one. There’s always going to be a girl who is prettier than you, so it’s kind of silly to focus on any one particular girl who is prettier, just because she happens to be your sister.

Also, girls often don’t believe this or flat-out refuse to believe this, but not all guys have the same taste. Not at all. There will be some guys who think you are totally hot and think your sister is only average. Guys don’t have a universal ideal… guys have types. The trick is just finding a guy who considers you his type.”

This is a guys perspective and its great. You really need to appreciate yourself more. We are all different but thats where the beauty lies. I hope this comment helped you ❤