Dealing with a perfect younger sister when?

You sound much older than 15! What you jealous 4 . You got all the love attention when she wasnt born , for 5 years. Grow up , do something for yourself , make yourself happy. Your lucky you got a sister who se loved & beautiful. Image if you had a sister whose ugly & bad!! Grow into a caring supportive sister not a *****! Stop looking for sympathy, be strong & bigger than that.