Liquidspace. You must be really gutted and I guess the reality of this is that if somebody has an addiction that bad, they will not recover from it, and you will not regain any of your money. since they will be too deeply in debt. The only thing you can do is learn from one of life's really hard lessons, split with your boyfriend and move on. And never, ever loan money to anybody again. If there's the slightest chance of recovering any of your money through legal means without incurring high legal costs in the process, go for it. But psycologically this may keep you living in the present when the only way forward is to make a clean break, both with him and the reality of losing your money.