My XBF was a cocaine addict, and he once told me that he'd been robbed when in fact he had blown all his money on drugs and wanted me to give him money. But I actually believed him and gave him money. Only later did I look back on it and realize it was a lie. I realize now that he lied constantly and would have said just about anything to get what he wanted. I guess my point is that it's hard to know what's really going on with your friend. Whatever it is, it doesn't sound like something that would be safe to be involved in.