This is the same with my last ex. I quit and left, invited him to come with me but he chose drugs. I don’t think he’s dead but I’ve had to block him on all channels, every come down he calls begging me to take him back saying he’ll change. I’m not sure he ever will because I don’t think he wants to change, drugs gives him something to feel awful about and that’s what he wants/feels he deserves.
Absolutely no regrets on my part even though I thought we were going to get married one day.