Children of Addicted Parents and People

im new to this site, im 19 years old and since i was about 9 or ten my dad has been drinking alot. he says he will stop drinking but he does not stop he says he will but can't and won't. sometimes when he is drunk he lashes out at me and has done in the past hit me or hurt me in some other way. the problem is i am seeing myself becoming my dad most weekends i am spending about £15 - £30 on booze and am just drinking it, simply to forget. everyone where i work says to me i wish i could be as care free as you are. i only pretend to be care free im not, im the complete opposite, at home i come home and just stay in my room, my dads drinking tonight he has shut himself away in the upstairs lounge and is sat there watching the tv and is drinking, sometimes i feel tempted to pour his drink away to stop him. but i never have, what can i do to stop him drinking ?? is there anything i can do to stop him from drinking ? i just want to get on with my dad im fed up of it its been this way for ten or 9 years now cant remember exactly when he started drinking heavily.