You need to schedule an appointment with a local therapist. A good starting point might be speaking with your guidance counselor, a teacher that you trust, the principal, your parents, or friend's parents. If you have tried those options but still feel stuck you an contact your state's local psychological association. (Ex: in Virginia it is the Virginia Psychological Association) - just 411 it and ask for referrals. Be sure to tell them that you are a teenager. If you feel unsafe then you can call 911.