Young Adult Readers discussion

I have very mixed feeling about Forever. I think Miss Stiefvater left the ending too open for my liking. I like to have a lot of closure. Sam and Grace had turned into irritating characters for me. I still had a liking for Grace but Sam could fall off a cliff for all I cared. Isabelle and Cole were the stars of this book. I might not have finished the book if it hadn't been for those two. What do you guys think about this widely controversial novel, Forever?