My boyfriend has a drinking problum and i dont know what to do..?

My name is Caitlin and my boyfriend has a drinking problum. I dont know what to do when he drinks. He gets vilent. He also is going to drug court right know for drinking and ceaps on drinking and know i am afrade that he is going to go to jail for 6 mounths because the jug told him the nest time he show's up durty on his uren test he is going to have to do 6 mounths in jail..And i dont know what to do because his urentest did come up durty and he has court tomarrow to find out what they are going to do with him. I love him with all my heart and never want to lose him. But i realy dont know what to do he is killing him self and the doc. told him that he need's to stop drinking... Please help me to deside . Thnk you!