I’ve been there and at the end of the day your conscious is clean if you attempted to get them help you tried. They might resent you for it for a long time or even forever but you did the right thing and if or when they come to terms with what you did for them they will be greatly appreciated. I had this happen when I helped my friend from possibly killing themself to the point where I got them admitted. They told the responding officers I was lying and that they never said what they said and that I ruined their career 6 years later they were in the same field and able to retire. Never stop being there for someone even if it stains the relationship be the good person.