Life Spiralling Out of control, cant seem to stop drinking

Hi,

Iam a 25 yr old graduate and have just completed my masters degree.  I should be happy but every time I drink I end up fighting and getting into trouble.  Alcoholism is high in my family with two cousins and 2 uncles and both grandas all being alcoholics.  When I drink my whole personality changes and I get very violent, agressive and obtuse with everyone around me and then I cant remember anything.  I have woken up in jail cells, with blood on me or with me being badly beaten up with no memory.  I have been like this for as long as I can remember and have lost many relationships due to the way alcohol makes me behave.  I drink heavily at lest twice a week to the point where I can not remember anything.  

Anxiety and paranoia then hit me for at least 7 days after a drinking session so i pretty much feel like I m losing my mind all the time which is really hampering me in my new job.  Also I struggle to make new relationships with nice girls because I forget how to really interact at a personal level with women after being with a girl for so long.  So I just have meaningless flings which evolve around drinking.

I have never felt more lost in my life and really and truly dont know what to do.  I have tried changing my friend base but keep going back, I have tried stoppin drinking but rarely last over 4 days.  I am now at the stage where I wake up and instantly think about drinking which has me scared. I think i need help but I dont know where from.  

Am I depressed, I need to get to the route of this somehow.  Any advice or similar stories would be greatly appreciated so I can pull myself out of this rut, stop drinking  and change my life for the better.