I'm so sick of high school?

I know what you mean. I'm a senior and have been waiting four years to get out of the same situation as you. You can switch schools and open-enroll in a different school, but remember that at some point in your life, whether it be college or a job, you'll have to deal with people you don't like and you won't have the choice to simply leave and be okay. Dealing with people unlike yourself can be challenging but it's best to know how to handle it in high school before you're swarmed with stupid or disgusting people later. It may sound grim to simply accept your misery, but try to make the best of it and know you only have two years left! Keep your head up :)