I think it is more helpful for us to replace 'I can't drink anymore' with 'I have chosen to never drink anymore. No take-backs. Boo Yah.'
My BP is tightly tangled with my AV recognition radar. I get those thoughts too, the ones that say 'Why not reward a good presentation with a drink?', and 'Isn't an occasional drink part of a successful, well-managed life?'. My answers are 'Because I don't drink', and 'No, it's not. I don't drink'. For me, there is no possible answer to those questions that would appease my AV. The only way to appease it is to drink. So rather than trying to find some acceptable answer to the question, I disengage and separate from it, then accept that it will forever remain un-appeased.
Here is a flow chart of sorts.
1) A thought about drinking alcohol. Or a thought of being unable to remain sober for some ridiculous reason.
2) AHAAA!!!11!!! AV, you jerk!!! Not ME, not what I want, not what I need.
3) Big Plan
4) Done
5) What was I doing before I was interrupted? Right! I was living. Onward!