SOLVED. YA Mystery. Guy tries to find out why his crush and her sister committed suicide. [s]

[Joyeong]

Okay so most of the book is lost on me, i want to read it again and im going to the bookstore soon. Please let me know if you know what it is

This is what i remember:
~One of the sisters name is Francesca
~The other sisters leaves notes for the guy trying to find out why they did it. (Leaving notes in intimate places, the shed the kissed in, the store they worked in together.)
~They killed themselves because they accidentally killed their cousin. The cousin was the asthmatic and basically, francesa, the other sister told the cousin they wanted to run. Well they did and the cousin ended up having a asthma attack. instead of giving her the pump she needed, francesca decided to pray over her heaving body because she wanted to impress (??) some man she had in infatuation with. Francesa pressed the other sister to pray over her body and not give her the pump too, she did and the cousin ended up dying.
After this Francesca killed herself because she thought she wasn't "holy" enough for the man she had infatuation with. The other girl killed herself soon after because she lost her sister.
~The book ended with two doves flying into the sky from where both the sisters killed themselfs at.
~I read this book when i was in 5th grade, so its atleast 2 or 3 years old.

Please let me know if you know the book im talking about! it was such a good read.

[Rosa]

Beautiful Broken Girls

[Joyeong]

Rosa wrote: "Beautiful Broken Girls"
YES!!! Thank you so much!

[Rosa]

You're very welcome.