2 stars because the book and the drama in it were completely unnecessary. to all the boys I've love before should have included the first 5 chapters of this book and it would have left me with a better feeling after finishing it. 
 --- beware, it might contain spoilers --- 
 the thing is I didn't really finish it. I read half of it, until John came into picture. I didn't want to read how Lara Jean once again get confused between love and crush (despite their conversation in the car at the end which was over dramatic, IMO). I skimmed through the book looking for Peter and Lara Jean scenes (I really really liked the fight scene after the time capsule party, that could be 3 stars worth it) and to know how the plot was developing (that's why I didn't quite get what the game was all about). 
 i didn't like the new characters, nor Stormy nor Johnny. the parts in the retirement center bored me to death and it was very predictable who stormy's great-grandson was. I don't understand why it was necessary to introduce a second love interest and build a new love triangle. I still don't understand Genevieve's hate towards Lara Jean even after she explained (nothing, absolutely nothing can excuse what she did to them with the video). I understand the complicated position Peter was in with Genevieve and Lara Jean, but I cannot understand why he chose to be loyal to Genevieve over Lara Jean. Lara Jean was right in that point, although not for the reasons she said (because he didn't love her anymore). 
 and I don't get the ending. it was so rushed. the drama was building nicely (if completely and out of proportion dramatic) and then at the end it deflated. and the ending was so depressing, even if it was kind of a happy ending. (view spoiler)[ the things Lara Jean says to Peter were true but like Peter says, she was almost telling him that they were doomed from the beginning. like "I love you now but we will end like my sister at the end, so don't get to attached", which completely spoiled the objective of the "happy ending" and left me wanting to slap Lara Jean in the whole face o.o (hide spoiler)]