Hi Colly,
Its true that only they can cure their addiction but, as you know, supporting them in the meantime is a very difficult thing to do.
I work for The Icarus Trust a charity which supports the friends and families of drug users. We have trained volunteers called ‘Family Friends’ who you could talk to if you get in touch. They have lots of experience of talking with people going through what you are and it often helps to talk. They would understand what you are feeling and talking with them might be a help to you. It is a free service.
You can contact us on help@icarustrust.org or visit the website http://www.icarustrust.org
I hope that you find some support for yourself. Good luck!
