Finally! Someone clears up the misconception of being cold-hearted rather than being extremely shy. I understood what the author meant so well - I find that sometimes happens to me too. Well, either I'm shy, or a cold-hearted b****, and I really don't want to think of myself as the latter. I find it horribly overwhelming sometimes to be in a crowd of new people (my definition of "crowd" is probably smaller than yours), and sometimes even in a crowd of friends. I absolutely shut up. Some of my closer friends get me - but some others just think I'm bored and rudely uninterested - or just plain boring and uninteresting. I've been called unfriendly before, which makes me shyer the next time I'm introduced to another group of new people. Worst part is, like Haley, I like meeting new people and making new friends - I really do - but not in herds and gaggles. 
 I'm glad the author brought this up. It's time for someone to be the voice for those who are too chicken to speak up (like yours truly). I instantly LOVED Haley for going through the same problems I have but have no clue on solving. SO forgive me if my review is a bit biased due to a tiny tiny part that probably most people won't pay attention to. 
 Well, the story unfolds with Haley living in her dream house with a not-so-dream neighbour (that is an understatement). I would never be so unforgiving if I were Haley - but probably just as chicken, again, as Haley for having no balls to speak up for herself and complain to that initially-awful Jason. Then Haley finally chooses to speak up - or rather, yell - at Jason and such communication allows Haley to realise that Jason is not such a dick as she thinks she is anymore. But a messy, rather inconsiderate neighbour, yes. I wonder why Haley still didn't mention anything of Jason's past bad habits once they to become friends. But still, they are rather sweet together. 
 Jason has always wanted to be friends with Haley. Now that they are, and that Jason has always thought of Haley as mildly attractive, he decides that Haley deserves better in her love life. Player that he is, he knows he isn't good enough for Haley (probably in the beginning, and starting with his messiness and his perpetual medically-frightening hunger) but delegates to himself the task of looking out for Haley. Meaning, chasing every single person with the Y-chromosome who looks at Haley, talks to Haley, or smiles at Haley. Possessive as he his, he literally kills Haley's love life, since he won't make a hit himself, which is kinda akin to a dog in a manger. But no matter. I enjoyed reading about their friendship the most. And of course you know what transpires from there. 
 I thought the story was interesting, the chemistry between the two main characters was definitely there. I am an absolute believer in friends-turn-to-lovers type of romance, I think it is kinda scary to not have your other half be the person whose company you enjoy the most with, and the person you can share absolutely everything with. But while I lived their friendship, once they reached the point of no return (I mean, when they officially get together), I really couldn't see them returning to the friend-zone. I think that in the romance department, the development was adequately, and satisfyingly done. 
 Of course, I had a few problems with the book in general, though I still enjoyed the book very much as a whole. *spoilers ahead!* Firstly - Jason. He may be friends with Haley, but Haley must have a heart of gold (view spoiler)[ - and a wallet of Gates - (hide spoiler)] to keep providing for Jason (view spoiler)[and his voracious appetite (hide spoiler)]. I found it scary, and a bit annoying that within a day, Jason invades Haley's life and home like it's his. While I can imagine that between friends, even my own, from an outsider's perspective, I found that the giving was rather one-way. Haley didn't seem to be getting anything in return at all (except probably company - since she is a wallflower right?). Secondly, the enemies-turn-friends transition was way too fast. Especially for such a level of friendship (see above point). I understand why some readers felt that the creation of such a friendship was unbelieveable and artificial - I would have liked to see a slow and steady development and deepening of the friendship myself, but probably this would make the book way too thick. 
 (view spoiler)[Lastly, the oh-so-typical misunderstanding. While the source of the conflict was legitimate and real - both of them have good reason to kill each other - I felt that the stubbornness on both sides kinda killed the situation. In the end, i felt that both sides were just trying to stay mad with each other - the initial reason be damned. And the make-up sex - can't we have something new? while I am only complaining it in this book, and not pointing fingers at some other previous book I've read, I do believe that given the lovely portrayal of both solid characters, I felt that both of them could have done much better at asking for forgiveness rather than the way they did it, and that even so, the "climax" was a yawn as compared to the other parts of the book. (hide spoiler)] 
 On the whole, this book was a great read. An example of how a simple plot can be pulled of with good writing and a steady development of the characters.