Hi Hopeful,
So sorry to read your post. You sound really really supportive to your boyfriend but Danman’s right he’s really got to want to get help before he will be able to.
However, if you would like support for yourself , The Icarus Trust, a charity supporting people dealing with the addiction of family members, provides experienced trained people, who would listen to you and understand. This might help you.
You can contact The Icarus Trust on help@icarustrust.org or visit our website http://www.icarustrust.org
All the best to you and your bofriend.