Why does my older sister overshadow me in everything?

So, lemme give you additional detail. I live in a joint family meaning my brothers live w/ their wives, my sister, parents, me....we all live together. My sister has a perky, alive, happy, easy to love personality. Me, on the other hand is only a teenager, i am shy, quiet, calm personality. My sister is in her twenties already and she has very many friends while i have barely a couple. It feels likeo matter how hrd i try to make an effort, i can never live up to her. She went to a top university, has a successful career. No matter where i go, if i start talking to somone, after a minute they will be like, wheres your sister? My sister in lawS, they all show so much favoritism towards my sister, not me ever! She has great style, awesome car, shes pretty..........i just cant stand this. What do i do? i must have cried so much at this idea b/c my friends, sister in laws, relatives, family friends always love her. In fact, once one of my aunt said, " You are still smart, but soon u can be smart as your sister". What the -------?, Oh yeah, my sister even has a better body then me! I just hate this!