Dealing with a perfect younger sister when?

I'm the oldest in my family and i have been in your shoes, i no longer get jealous anymore but it does sometimes get to me when a younger sib gets everything and you well nothing, you've talked to your parents and you got your point out there, that's a great initiative, i'm 16 btw so trust me i can relate, the most you can do is keep trying to talk to your parents about how you feel about this. Honestly, only time will help you get over it, slowly but surely it will get better :)