What are my chances of getting into UCSB?

I am currently a high school junior and my dream school since I can remember has been UCSB but I don’t think I can get in. I am taking the ACT and SAT in April and May, but my GPA is about 3.7, I took two AP classes this year, have gotten one C in my high school career (the rest have been A’s and B’s), have been in Leadership for most of high school and am running for ASB Vice President next year, and am part of the National Honors Society Club and CSF. I also do community service. What are my chances of getting in?

Calculate your UC GPA and repost with your SAT/ACT scores. Your EC’s are decent. Definitely spend time on your UC essays. UCSB evaluates your application based 50% on GPA/Test scores and 50% on essays, EC’s and special talents.
http://rogerhub.com/gpa-calculator-uc/

Make sure you have some safeties and definite match schools on your list since the UC’s have become increasingly competitive and selective.