Really sorry to read your sad story but glad that you have found this forum and am hoping that this will help you not to feel so alone.
I work for a charity called Icarus Trust. We offer help to people, like you, who are being affected by a family member’s addiction. Our Family Friends are trained and experienced people and you could talk with one of them if you get in touch. They will listen and be able to let you know what other support is available for you.
You can contact Icarus Trust on help@icarustrust.org or visit our website http://www.icarustrust.org
I hope this helps. Good luck!