I can't imagine my therapist, or the last one, being upset like that. Instead, I'd think he'd ask about my feelings behind it. It would be a good opportunity to address why you are doing this. For example, it could be self-sabatoge, like Pfrog said. On the contrary, it could be that you have an "attachment" to alcohol as opposed to a person. This, I believe, explains most substance abuse...

Working through this issue doesn't seem any different than working through other issues that include acting out, resistance, etc. Maybe your therapist was upset at himself that he didn't realize you were under the influence all of this time? That could be part of it.

Whatever the reason, he likely was shocked, so give him some slack about his reaction. Wait to see how it goes before you make decisions about continuing. You want someone to help you, right? Then don't run.