I love music but have no talent ... zilch! I appreciate greatly those who do. For you to be unable to recognize yours, and now to play and improve and perform for others, seems to me the cruelest sort of suffering.
I wonder--along with sad star--whether you couldn't be in a more appropriate school. Where I live, schools at every level are available to students with particular talents ... math, engineering, & science ... performing arts ... visual arts ... languages and so forth. Check with you advisor/counselor.
Being ranked as the best high school clarinetist in your state and then not being accorded the possibility to study and perform accordingly would throw anyone into a depression, even if they weren't inclined that way. This situation can be fixed--maybe, once you've talked with your counselor, you won't have to do all the work yourself.
Stay in touch, post often, okay?
Roadie