Hello Bompilsf: I noticed this is your first post here on PC. So... welcome to Psych Central.

I'm sorry I don't think there is anything I can suggest to you with regard to all of this. We here on PC cannot offer mental health diagnoses. Plus I'm not a mental health professional. The one thing I know is that you can only change yourself. So until the man you've written about here decides he needs help, & seeks it, nothing is going to change. Consequently what is left here, in my opinion, is for you to decide how much you care about this man & how much more of this you are willing to put up with.

Here are links to 5 articles, from Psych Central's archives, that touch upon the subject:

You Can Only Change Yourself

Stop Trying to Change People Who Don't Want to Change | Happily Imperfect

11 Ways to Help a Loved One in Denial

How to Help a High-Functioning Alcoholic in Denial

How to Persuade Your Loved One to Seek Professional Help

I hope you find PC to be of benefit.