I think I am addicted to alcohol at 17?!

I know I am what can I do to get help? and i do the stupidest things 2 like sometimes try and kill myself, or steal my moms car. i recently totalled her car drving drunk she hadda get a new 1. and this weekend I had a party and there was like 80 ppl there and my house got trashed its just horrible. thankgod my mom never found out about that. i think i needa go to drug and alcohol services or something. I even sometimes come to school halfcut, I need help????