I think the biggest problem with your whole outlook here is that you think that when you go to college, you have to decide what you're going to do for the rest of your life. I got into Whalen school of music at Ithaca as a clarinet education major...and then decided that I wanted absolutely nothing to do with it, even though I had played and dedicated myself to it for over 8 years.
Now, I'm heading into the field of forensic psychology, and will soon be going for a JD and a PhD conjointly. Do I still compose? Yes. Do I wish that my parents had let me go for composition? Sometimes, yes. Do I regret switching majors? Hellz no....it opened up a whole new world for me. Now I do research about eyewitness testimony and I'm a part of a team that's researching the latest in treatment of Autism.
what I'm trying to get at is that you don't need to decide to become a composer at 16 - thee most popular thing to do in college is change majors, lol. It's all up to you, and how big of a part you think music will play in your life. Even if you get into a great school, making a living as a composer is very difficult nowadays.
I say, go to college as undecided, take as many classes in different majors as you possibly can, and still compose.
