Im desperate! Does anyone know where I can seek help with drug addiction?

I’m 25 yrs. old and I’m addicted to crystal meth. I have been using heavily for nearly 3 yrs. Prior to that, I had been using i=other drugs as well. Drugs like….Ecxtacy, cocaine, pot, and worst of all….Meth. I have completely changed as a person and I no longer have dreams or goals. I was very academic in school and very bright. Meth has taken all that away. Inside I am screaming for help, but outside I pretend I have control of my life. That is clearly not the case. I’ve hurt so many people and lost all my friends. I have no ambition, and low self esteem. Those who love me are extremely concerned and I need help. I need guidance and support before it’s too late. Why do I use soo many drugs? How do I quit? I need to speak with someone. I feel severely depressed and I am begging for any information that can help me get my life back.