Play the old "Im sick" act.

I'm such a horrrible actress. Meh, besides, I used that to get out of going last night... Maybe I should just go and have a miserable time... The people at youth group hate me, but I can't tell my mom that... ITS NOT FAIR, I wish my parents didn't go to church or something

Just act like you're going, go AWOL when your parents aren't looking, do whatever the heck you want, then go back to the youth group right before it ends. Problem solved.

Right... I'm 13, I don't have a car!

I live in the middle of nowhere, no interesting places near the church or buses poor me

Tell you parents they don't like you...
I can't goto church for several reasons, and one of them is; I don't like it.