I hated the ending! :(

I watched the whole drama in two days and I really liked the characters. The story was quite lovely. In the last episodes things start to go wrong but it is something you would have expected. However, I really expected a happy ending and hated the way they closed the story!!!! Really!!! What is the need of leaving the story like that??? The truth is it dissapointed me and left me with a sad feeling :( I hope they would consider adding an extra episode where they show us them together!!! Or a second season!!!