How to tell a school friend to stop talking about Islam 24/7 without making yourself sound like a non believer?

There's this girl that I hang out with in school and she won't stop preaching about Islam. Last year she was alright and didn't always yell out astagfurullah over the smallest things, I can't even show my other friends new songs I like because she'll start lecturing us, hold her hand on her ears or walk away.

I don't understand how one can be as religious as her and still really disrespectful. She's a 14 year old who has absolutely no respect for her elders. There's not a day that goes that she doesn't talk back to our teachers and when that happens, she gets even more mad at them for sending her out of class. She makes fun of mental illnesses such as depression and makes fun of our friend behind her back because she used to cut. She makes fun of people's facial features but when someone makes fun of her really dark skin, she goes on and on how God made her that way and they shouldn't make fun of it.

I tell her to that she should change her way of behavior because it's really nasty and won't get her anywhere but she just laughs it off and then gets really mad when I say how kids of 14 years and younger are really disrespectful these days. ( I'm 2 years older than her but we're in the same class, bc she's from West Europe where they start school earlier than us in northen Europe ) + ( were both in our home country now )

I'm honestly tired of this girl but I can't get rid of her seeing as she's to obsessed with me. I tried it once but it didn't work. I can't even listen to music on the bus without her preaching the whole bus ride about how I'll go to hell for listening to music everyday and how kpop and punk rock won't take me to heaven. ( I told her it would if they fucked the life out of me (JOKE) and she nearly had a heart attack lmao )