I would check with someone and see if the car and insurance can't be put in his name now. Sell it and let him take a cab or bus, is that possible.???
If drinking they should not have access to a car. I know if they can buy one then no one can do anything about it except report them to the police if know they are drinking.
Was he talking about wanting or needing a car when you first met???
I am not saying he is a bad person, but the alcohol is in charge, and will be in charge till they are sober for many months.
It is your home and your car, what was he doing before he met you, was he with someone that provided a home and a car??
WE females manage to get ourselves into deep doo doo I am thinking.
Sorry, Just my thoughts, but if you have only been involved for 2 years and no childern I would suggest getting out of this. It gets worse and a long long road, even if and when they find recovery.
Alcohol is cunning, baffeling and powerful. No on wins in my opinion.
Take care of you. Also not good to hide things from family and friends. or think you are hiding it, usually everyone in town knows who has a drinking problem.