I read a lot of bad reviews for this movie and I am glad I did not listen to them. I was a little nervous when I read that the character becomes clinically insane but I was happy to see that he was so much more than that.Although Charlie definitely "went mad" with jealously, he was essentially harmless and was only hurting himself. He did not do anything violent or over the top crazy in my opinion. He was a victim of crippling paranoia which caused him to quickly jump to wild conclusions and then act on them. I found myself laughing a lot and also feeling sorry for him, I was never afraid or creeped out by him. I thought the chemistry between the two main characters was great and I was definitely rooting for them the whole time. I wish there had been more happy moments between them before things got awkward. I am glad that she forgave him and accepted him for who he is in the end and that he was able to become better because of her. I struggled with OCD and paranoia for most of my early life, so maybe that is why I was able to relate to him more. I really liked his loyal best friend in the movie and I love the quote at the end that said "since Charlie's condition would never fully disappear, he would always remain just crazy enough to keep things interesting." I thought that was very profound.

I watched this movie a year ago on a train in Spain. It started like a nice goofy comedy, but I slowly started to feel unease. I eventually realized that this movie touches on some very deep emotional nerves. Anyone who was ever "lovesick", anyone who was ever passionately in love, crazy in love - anyone who loved and lost, who experienced the fears that accompany love - would immediately feel connected. And would immediately feel unease by this film.It beautifully and brilliantly shows how love can drive us crazy with fear. You helplessly watch as the main character destroy his happiness, succumbing to irrational fears and paranoia's.It's hard to watch, it makes you think. And something happen then - it transforms you. It opens your eyes. Even if you are not as "lovesick" as the main character, you are to some degree like that. Everyone are like that or have the potential to be like that.Yesterday I watched it again with a friend. She had to stop several times because it was too hard - she was beginning to be so emotional - reflecting on her past relationships. It was clear: She too has been transformed by it.This is why I think this is by far the most therapeutic movie I have ever seen (and I've been around the block). I can't really put my finger on it. The acting it OK, the story is OK - it's all "nice" but not amazing. And yet - it's so powerful. It's so well done. The fact that I can't even really explain why - is what makes this film brilliant, and whoever made it - a genius!But then I come to IMDb and see this movie gets really low score. So maybe it's just me. Maybe it's just us, lovesick people, who can really relate to this movie. And the rest of humanity just sees it like another goofy mediocre comedy. Who knows.For me it's a 10/10.

This Movie is a perfect example how you don't have to act when you are in relationship. It relate perfectly to the really jealous people, who can't get over their fear of disappointments when in love. Every person once in a while got its suspicions that maybe the love one is in a affair, and goes to the limits to prove his believes. Eventually everything goes back to its place and all the suspicions disappear. The Movie is mixed with twisted sense of humor and big dose of the reality nowadays. It shows the long way we have to go in order to understand the situation and move on. The point is to trust each other more and not to get into neurotic jealousy that will destroys our relationship.

i just want to remind you that life is short, so if you don't want to be turned out like i, i mean, we did (several people actually), wasting about 1 hour, trying so hard to be enthusiastic, be connecting with this stupid film, that hour been wasted would never get back after survived 68 years on this planet earth. my god, how could this stupid and boring screenplay got the nods from a bunch of rich investors? if you guys are so loaded, it means that you guys must be at least smarter than the usual population (including aforementioned several people), but how possible that you guys would have approved to pay for such stupid script and signed up these actors to make such pathetically boring film? we all cursed when we decided not to watch along, because this film just made us feel as stupid and boring like these roles played by those pathetic actors, and of course, there were lot youngsters playing the school kids, and likewise, they also acted so unnaturally boring. this is one of the most awkward so-called 'romantic comedy' genre films that is simply so embarrassingly rigid, contrived, cardboard-like tasteless boring to the extreme.