Why I wrote a story that is over 450 pages long

If someone had told me two years ago that I would write a story so long and complicated as I did, I would have probably laughed. Then I would have immediately gone home and try to write a story that would one day be over 450 pages long. Truth be told, I started writing to take my mind off of everything that surrounded me. It all started in May, 2013.
By October, 2013, I had a story that was ten pages long. 2014 is when I started actually writing. My writing improved a lot and it became something to look forward to. After school everyday I would end up writing at the very least a half an hour a day. One time I ended up writing for about two and a half hours before remembering I had homework. My stories involve multiple heroes’ who overcome challenges. In a part of my story, the two main heroes’ are tricked into fighting each other in a battle to the death. They all are extremely bloody and are really fun to write! They mean a whole lot to me so if these stories ever deleted I'd probably throw my computer out the window and never write again. It’s all fantasy and medieval. I chose to place the story in the land of Tamriel, where the video game Elder Scrolls take place, and created an entire story that I would say is better then the story of the video game itself. I just ended writing the end of it about a day ago, and it became more violent then I thought it ever could.

I just don't like ending stories because its hard to find new ideas. The main problem with my writing is that I can't write a good ending to a story. Whenever I try to end it, my story becomes a cliff hanger. I’m currently trying to end it, but I just left another cliff hanger with another threat that is more realistic. More realistic being less magic and more weapons. I know it’s probably bad that the writing can be a huge distraction to my school work, but I honestly don’t care as long as I can keep writing my story.