My partner has had a cocaine addiction for the last year and I think I'm at my breaking point
His mum (who he was very close to) died unexpectedly and very quickly last year - it was really traumatic for everyone involved and since then he's bottled up his feelings (unless he has a drink but that's a different story).
He's taken to taking cocaine, by himself at home, until 4/5am several nights a week. I've tried everything to support him - tough love, being there to talk through anything, but it's like he's stuck - he will have a drink and relive her dying and say the same things over and over. With the cocaine, he lies to cover it up, lies about money. He went to AA for a little bit as he only does it when he drinks but that only lasted a few weeks.
Last night again, we were speaking, and he was quick to anger and acting a bit odd so I went into see him (was walking past) and he had picked up and was already high. Tried to deny it then said he was planning on tell me. I left and he said he wouldn't do any more he was embarrassed, but when I came over a few hours later he was off his face. He said he thought it was fine as I was staying over, therefore he wouldn't stay up all night doing it
What can I do? Can I help him? It's been a year and I'm ending up so hurt by all the lies, how much he's potentially hurting himself and all the arguement due to secrecy and lying about it... I know if he doesn't want to stop he won't but he says he does  he says he's massively cut down but also promised me from new year that was it he would stop, he lasted 2 days. I feel like a walkover but I also don't want to give up on him