I'm not sure you're ready for rehab, it generally works best when the addict WANTS to do it and that's not where you seem to be. :
"I've drunk a litre of vodka tonight and I love this feeling. I feel normal, if a bit buzzed." Op loves the feeling, she doesn't want to stop.
"I crave sobriety. I love the IDEA. But I can't see how I can say goodbye to feeling like this ever again. Stone cold sober feels jagged and painful and it's not something I can imagine committing to" doesn't want to be sober.
"I'm basically ruining his life, and I know this, but I can't bear the idea that I'll never feel this way again." Being drunk is more important than ruining the life of someone op claims to love.
"How on earth can I convince myself that alcohol is no good when it seems so nice?" Doesn't really believe alcohol is 'no good'
"My biggest fear is that Dh will leave. I walk a tightrope between pissing him off...and just wanting to feel a bit pissed."
"I'm not drunk in the afternoons. I'm functioning better after half a bottle than I would be without." Denial
"I knew I was going to reward myself with a drink after two weeks so it was easy peasy." Do you see how ridiculous that is?
"I was looking for an easy answer as to how to stop enjoying it." Doesn't exist.
"Rehab is an option and I will discuss it with the facilitators tomorrow." Not even the pretence of admitting you need to stop drinking there. It's just 'an option'.
"I'm going to talk to them about rehab tomorrow. It's on the table but I think there are hoops to go through first, and it will probably have to wait until after my medical which they said could take up to a month. 

I am starting to accept that it might be what I need though." But not what you want.
"I feel actually ok today. I have group tomorrow and it is a fresh week. I haven't drank today and I won't drink tomorrow. I'm going to do this." While that's good to read, it's the hard days when you're more likely to drink.
"I'll tell him about the drinking in the day, he does need to know." Please stick to this, he needs to know as your daughters other parent.
I'm from a family (on one side) of addicts, not just alcohol. Some are in recovery, a few have died (as a direct result of their addictions) and a few are hanging on as in alive but still addicted.
My own father is an alcoholic. Addicts are selfish while in the grip of the addiction and some continue to be even when they no longer are active addicts. Bearing that in mind consider future effects on yourself your own health
Varices, cirrhosis, kidney failure, pancretitis, diabetes, heart disease, korsakoffs (dementia) It affects EVERY system.
And it hurts! My dad is on morphine pretty much unlimited and it barely touches the pain. For certain conditions there's very little treatment and rarely cures. Transplants? Active addicts are very unlikely to be eligible, not as a moral judgment but because they're unlikely to adhere to treatment regimes.
Do it (rehab) for you. To avoid pain, to have a better more joyful life with your family, to not feel guilty EVERY DAY to live to see your grandchildren and be able to play with them. To feel healthy and energised and HAPPY (because the bipolar also responds far better to treatment without alcohol in the mix).
Other people can help, support but only YOU can do it.