u/Flaky-Investment-580

Trying to remember a YA/NA mystery series I read around 2015:

- Main character was named Holly / Hollie / Hollyann (or similar)
- First book: high school friends trying to solve a murder (possibly their friend’s)
- Romance subplot
- Cover may have had a shocked girl standing near blue lockers
- There was a sequel/part 2
- In the sequel Holly is in college and falls for a biker/bad-boy type guy
- He turns out to be crazy/obsessed and tries to kill her
- At the end he accidentally catches himself on fire

Does anyone know this book/series?