My partner and I have been together for 2 and a half years now. In that time, he has never stopped being loving, kind, passionate, intelligent, and all around sweet. He's also, in that time, taken drugs on a purely social basis - mostly ketamine, sometimes coke. When I say social, it really was the occasional dedicated night, other people around, etc. I wasn't a fan of the coke, but I could happily love with the rest on the occasional basis. Before I met him, he had been addicted to crystal meth, but was clean for a few months.
This year has been a different story, though. He wasn't in the next place in January, and I thought it was post holiday blues, less daylight and so on. February, though... We're in an open relationship (has worked for us so far) and one night he went out and when he eventually got home, he had been sexually assaulted. Coerced into taking meth, and then into sex on tape while not in a place to give meaningful consent. I know how it sounds, but with the exception of one relapse since then (and the relapse was buying more than taking, I helped him get rid of it), it hasn't been a factor since.
But everything else has gone up instead. Ketamine, sleeping pills, and cocaine - that's basically where all his money goes, and more. He's racked up debt, and when that's not enough he asks me. I've always said "yeah, you can pay me back", but it's become clear that he won't pay me back. He remembers, but he's got so much else to pay back, and the first thing he thinks about at pay day is more ket, more diazepam. In the past two months I've watched him descend from these drugs as occasional and social to on his own, and increasingly frequent. I've watched helplessly as he turned the house upside down looking for either another hit or some cash to buy one. When I'd had no money left myself, he spent the night asking me again and again if I wasn't sure I had more. He'd bring up instances where I'd fallen short in being his partner, then ask again if I really hadn't anything more to 'loan' him.
There are some positives. It's still early on in the process, and I haven't lost him yet. He's still fine most of the time. He had signed up for counseling, so he recognizes there's a problem. Albeit that was more to do with meth and alcohol, and to a lesser extent cocaine, and he doesn't seem to realize the impact of the ket use and the sleeping pills. But I'm watching this descent in real time, and I don't know how to help him stop it. I feel helpless. His family doesn't know and most of his friends aren't aware of how bad it is. I'm hoping that going through how much he spent on drugs last month, and now having missed two days at work this month, that he can realize how much of a problem it is, but I worry he'll find a way to rationalize it away. And I'll be back to feeling helpless, alone, and constantly on the verge of tears.
How do I approach this before rock bottom shatters us both?