there is nothing you can do to fix their drinking problems. it's a losing battle and can really get depressing. you simply must keep up with your own self care, tending to your own needs as best possible.
it's ironic that your bf finds someone else's drinking "shocking and disgusting" - but is that enough for HIM to stop? while he has been waiting for a call back has he even attempted to not drink, or not drink as much? is he doing ANYTHING for himself?
since he has a line of help, please let him deal with it. you have your own things to deal with , to tend to .