We know why you drink.

You want to escape the pain of your curse and what it makes you do, Werewolf. You know the cause of all these "strange animal attacks" but you do not want to face the pain of guilt, so you attempted to wash your memories away with your drinks. But still the memories existed underneath the rivers of alcohol. The same rivers that were polluted with blood. Drunken days transformed into lycanthropic nights attacking the innocent. One curse has been cured. Let's hope for the transformative powers of love to help with the other so you can be fully human again.