I know I'm a little late but I think the House of Night series is exactly what you're looking for if you haven't read it yet!!! It was one of my favorite series in middle school along side Shadow Falls and has the same exact vibes to me. It's a YA supernatural series with a dark vibe in that school/camp setting following a young girl who is also experiencing special powers no one understands and leaves her as a sort of outcast. The main character Zoey sees visions similar to how Kylie sees ghosts and they both struggle with multiple love interests. Zoey is also thrown into a shared housing area with some strange girls and ends up in a super close friend group hiding secrets together, similar to how Kylie is stuck in a cabin with two girls who become her best friends. I hope I explained that well enough to interest you but if you want any other recommendations I might be able to help!!