Should you decide not to read the book based on the film?

Today I went to see The Fault In Our Stars with my friends. This film was originally my suggestion as even though I hadn't read the book I had heard a lot about it. I knew that I wouldn't get around to reading the book before I saw the film and reasoning that the book is always better I decided that it wasn't such a problem. That is until I saw the film.

I know that it's about cancer and two teenagers falling in love and I fully expected to cry. However, I was never once moved to tears or even close. I left the cinema feeling completely devoid of emotion and not in the way that a film can leave you feeling numb because it has had such an impact on you. I just never believed in the scenario, I was never invested in the characters or the love story. 

Augustus Waters I found to be cocky and arrogant, yes, but from the outset it seemed to me that he was in fact just a scared little boy who was frightened to die. Well of course he was! That would have been fine if I didn't think that the film worked so hard to deny that. When Gus' cancer comes back with a vengeance and he loses his smart-Alec attitude I believed it. That was the moment that I was the most invested in the story, but it didn't last for very long. 

Hazel's eulogy to Gus, her original one, left me completely cold. From the first moment it seemed that Gus was determined that Hazel was going to be his girlfriend and I didn't like that. For me, it made everything that happened afterwards forced or shallow and not very organic. I can believe that they were best friends and so the grief is believable enough. I thought the eulogy that Hazel read out at the funeral was dishonest. The voice-over clearly states that she didn't believe a word and I think that's the problem with a lot of the gestures and statements made in the film: they were empty. 

The smoking 'metaphor' is also something that I just didn't get and thought was very pretentious. This coupled with all of the reasons above meant that I just didn't enjoy the film very much and was quite unmoved by it. However, that was just the film and I am sure that many fans of the book will be disappointed with the film as well. So I ask you, do I still keep this book on my mental TBR?