have you tried exercising? maybe join a sport at school. exercising can help a lot of people with anxiety to make you feel better and relax. plus you'll get in shape and live a healthier life than smoking weed everyday.
even if where you live recreational marijuana becomes legal, private organizations, schools, and businesses can still have a drug free policy. where if you're caught, or it affects your school or work, you could be suspended, disciplined, terminated or expelled. so keep that in mind.