Honey, wishing doesn't make it so. You have to WORK to get what you want!
Are you working with a teacher? You will need a lot of training to get to Broadway. It sounds to me as though you really do feel you have the basic talent, so now you need to find someone who can teach you the skills you will need. Ask your music teacher for a vocal teacher referral. Study hard. Do the research! Here's a person who has your same goal!
http://answers.yahoo.com/question/?qid=1006042117653
And here is a school.
http://www.broadwaytraining.com/
It's all about the effort you want to put in! You will need to work hard, have the determination, and put 110% into all you do. GO FOR IT! And when you are in your first show, I expect tickets!!!