Welcome!
If your fiance has had problems with addiction in the past, then the alcohol use doesn't sound like a step in the right direction.
There's a lot of support round here, there is even a forum dedicated to the friends/family of alcoholics which might be worth exploring.
In terms of your own stuff, do you have any ideas to help you stop drinking? I go to AA meetings, my local drug and alcohol centre and I use this forum a lot. Might be worth having a think about and drawing up a plan :-)