This was most likely purchased from a Scholastic Book Fair in the mid to late 90s. I don’t remember the title but I think the cover was dark blue with an image on the front but I can’t remember what of. Something vague like two shadows or a book with a pentagram on it. It is a short book. Probably around 150 pages. Could be Middle Grade or Young Adult.
Details I’m pretty sure of: The story was about a teen girl who moves to a new town and gets a crush on a dark, mysterious guy. He brings her into a group of friends that seem cool and goth but end up being a satanic cult that sacrifices a cat in a dark cave. She is eventually saved by a love interest.
Details I’m unsure of: Vaguely supernatural elements as in things happen that seem magical but may not be. I think there is a scene where she escapes through the basement of a restaurant. Towards the end we learn that she moved to this town because her parents died and the parent’s dying was orchestrated by the cult. Maybe the leader of the cult is revealed to be The Devil. Maybe because we see flames in his eyes or some other devilish detail. There might be drugs involved. There might be an element where the protagonist thinks people have been killed but then they are found alive.
Thank you for the help! This has been bothering me for YEARS.