oh USA!!!! where is my dear host family????

When I was little, I knew a word called “American Dream”. The teacher said that means some people took America as a paradise to begin their new life. Today I am a senior high school student; I also have an American Dream. I want to be an exchange student!! But how come others student all find out their host family, remaining me still waiting for the agent call me a phone say,: Congratulations, Pei-Hsaun! You have a host family and you can go to USA to fulfill your dream!!
Now, where is my dream? Does I not well enough, or my English is too poor to understand how much I want to go to the USA?!
Oh my!!! I want to explore my life! I want, and I must to discover new things in my life! Please give me a opportunity! Oh God! Let my dear host family appear, please!