Friend has changed

Dear Caitlin,i started going to high school a year early after skipping the eighth grade. i was supposed to go to this new school with my b/f at the time but decided i wanted to high tail it out of school and get on to college instead. the thing is i haven't seen my friend since i started going to high school and she started hanging out with this satanist and saying that she didn't need god anymore and becoming a satanist herself. My friend and i had both been commited christians (we both were brought up in the church and decided to accept God's forgivness and live for him at an early age).i cried when i had heard about what she had been up to lately from one of our other best friends, who was worried about her and asked me to talk to her, since we had been closer then they had. i really want to help her but i don't know what to say since i haven't seen her in a while (since we also go different churches)(she still goes to church cause her mom makes her)What should i say ? any ideas?
from, b

Dear B,
The first thing I would do is to ask this friend if it’s really true that she’s become a Satanist and if so, why? It’s possible that she’s not so much into Satan as she might be into going through a rebellion against her family and church. If you can get to the bottom of it, you might be able to help her. But you have to be willing to listen (without coming across as judgmental) and then you need to let her know that you still love and care about her (as does God). And, of course, don’t forget to pray about this before you talk to her.
Blessings,
Caitlin