Im jealous of my cousin?

we're both in 10th grade and go to the same school and are super close! We look like twins except different fave shapes and her hair is short and mines long, and that shes taller than me and im a little shorter. She always gets flirts by guys and knows ALOT of people and like all the guys love her. its like everytime we walk to cl a guy stops by her and hugs her and says hi. i dont have that many friends but shes liike sooo liked and i just like known as her adorable cousin..how can i stop feeling this wya? help!