Hi Brittani,
I understand your frustration. The reason the experts probably kept telling you to leave him alone is because that is all you can do for him.
Life depends on each of us taking care of ourselves. Your bf sounds very sick, but it is the kind of illness that he and only he can seek help for. Your involvement in his treatment only prevents him from truly getting help. You cannot convince him to help himself. He has to want that.
As sad as it is not everyone lives a long and healthy life. That is reality. If he chooses to end his life by drinking, then that is his choice. You might not want him to, but it isn't up to you.
Focusing on oursleves helps us to take the focus off of them and what they are doing. Since we cannot control others, we can only control ourselves.
Hugs