SOLVED: group of girls that go on a school camp they try to scare one of their friends but she has an asthma attack and dies [s]

[OG]

this book is a young adults book. i read it maybe 5 years ago and can't remember what it is called and i would like to buy it. it is about a group of friends that go on a school camp and (this part is a blur) they go into the woods and one of them ends up dying i think by an asthma attack because another girl tied her up to a tree as a joke , to scare her, with a pillow case over her head. her friends find her and then panic and decide to hide her body in a well. the next day they then tell there teachers she just went missing and so they come to the conclusion that she may have drowned (because she was a very good swimmer and probably went for a morning swim) then there is a complication of how they deal with hiding this secret PLS IF U KNOW THE AUTHOR OR TITLE LET ME KNOW :) THANKS

[OG]

i finally found it after days of pulling out my hair. it is called torn by cat clarke :)

[Bargle]

Clicky for the book. Torn