TFIOS flaws

So I'm going to give my opinion on what I thought was the worst thing about The Fault In Our Stars. It was an all around amazing book, and I think has impacted me the most out of all the books I've ever read. The only thing I don't like is the ending, but then again I do. I don't want to give it away but I'll just say it was very very VERY upsetting. It ended in such a sad way, but I also don't think the author could've done it any better. I think the only reason I didn't like it was because it was so real and didn't have a happily ever after  like most books. It hit you in the gut of how life really is and that sad things do happen and you have to be able to live with them. I think I like books or movies because they always end happy or the way you want, and it helps you escape from life, but TFIOS ended in such a real way that it upset me. I didn't like the ending, but then  again I loved it.