There’s no harm in applying a 3rd time to those 2 schools, especially if your application is markedly different. It’s possible that you’ll get a different decision but unlikely.
As others have suggested, if your heart is set on attending BS, cast a wider net. There is a large universe of truly excellent schools, and it’s possible that you may be a much better fit for one you have not yet considethere.
If you’re happy where you are, there is no reason to leave. Save your money for college and take advantage of the knowledge you have of your current environment to make the most of your time there.