It's actually more like 3.5 stars. The story confused me a lot. The first part of the story was very uplifting and funny but then it changed and turned into an awful and depressing book. There was a moment when I just stood up and poured myself some wine before I could go on reading.
I actually liked the main character Sky. She was very confident and didn't care about other people's opinion very much. I was laughing my head off, when she added stuff so that the insulting notes on her locker would be more artistic. It also didn't bother me how she and Six called each other. My friend read the book in English and was upset about the words Six and Sky used while talking to each other. I read the book in my mother tongue, so maybe those words the translator used weren't so offensive in Estonian. Or maybe we are just different people who react differently to words like that. The other very funny moment was when Sky sent a message to a wrong person by accident. I loved that Colleen Hoover created a character who didn't know much about computers and mobile phones. The author actually sent a message that you can live a full life without technology as well.
Holder wasn't such a pleasant character. His temper made me careful. I also didn't like how the author romanticized sneaking into a girl's room in the middle of the night. It's not romantic, its creepy as hell to let a boy you barely know climb into your bed in the middle of the night. It makes me so mad, when authors use that in a story.
Still, I liked Sky and Holder as a couple and my biggest regret is that they didn't get any professional help. In my opinion all three (Sky, Holder, and Karen) needed it.