What to do?

My partners dad suddenly passed away a year and a half ago and he turned to drinking he was drinking a straight bottle every night I knew it was hard for him to cope even more so because we lived over the other side of Australia to his parents and after our 8hr flight home he was just wanting to say good bye to his dad but the blow came when he was told he could not see the body he dealt with it very hard but after heavy drinking for 3 months he stopped and found a new job he new it was time to move on stick by your partner and guide him back I'm sure everything will be okay good luck xxx