Well, not everyone drinks to get drunk. I've found that to be true in my own life.
As to him not seeing a problem? You know your own reality. Whenever someone mentions that so and so doesn't think I have a problem and I don't want to believe I have a problem so I guess I don't have done, I think of the Amy Winehouse song, Rehab. "I don't have the time, and my daddy thinks I'm fine."
Well, Amy apparently wanted to think she was fine, like daddy said, but it's a rather bleak ending in that she's dead of alcohol and drugs.
So, keep doing what you're doing. Maybe give communicating with Jeff a pass for a bit?