Can anyone please help me with my personal problem of my church youth group?

I'm 15 years old. When I came to my church yg, I was 12. There was barely any kids my age expect these two boys and a girl. I was in that church for about 6-7 years. After I came into the yg, I barely came to church because I was shy and I was afraid of people judging me. But people were really nice and gave me lots of attention. Then one day, this loud, outgoing girl came, who is a bit younger than me, into our yg. She started to get all the attention and she fitted right in. I don't get it. I've been in that church for a longgg time and i'm still afraid and shy. I hate this. Everyone that is new in our church gets along with everyone and is a active participant and i'm just crying over being shy. My church has few rude kids that say stuff about me and I cry over that even though I've been in that church longer. I want to leave a legacy into that youth group but i'm so afraid..