Publishing the book “once upon a time”

I´m 15 years old and I have been writting since I was 9 so it is 6 years of improving myself. In the past I had sent my stories into a lot of editorships but they said NO, you should first publish it in some magazines. On the other hand a lot of people who read it said thay would like to buy my book, once when I will have it. So now I´m trying to publish my own book by myself. However, it costs a huge amount of money I don´t have. And what about my work? It is the story written as a poem about a girl who is wandering through the world without any memories from her life. It has got 50 small pages but it costs to read it!

I know I am too young but when somebody is reading what I wrote he/she is in amazement and also he/she says "You wrote it? Like really? No jokes?"

I would really love to have my own book in my hands. That´s my biggest dream. I hope you will help me to make my dream come true. I would really appreciate it.