NC.
So sorry for what you're dealing with @BottleDown but well done for taking steps to exit the relationship. I'm sure you know about alcoholism being a family disease - it's something that children really shouldn't be exposed to. The damage is immense. I have some idea of how hard what you're going through is but please, please follow through on making that break, for you and your child's sakes.
I was in a (same-sex) relationship with an alcoholic for two years. I didn't realise she was an addict at the start, having had no exposure to alcoholism in my own lifetime, and being (ironically) tee total myself. We didn't live together which also made it harder to really witness. I worked it out after the first year, spent the second year trying to do all the things I now know from bitter experience to be utterly, utterly pointless - pouring hidden alcohol away when I found it, trying to persuade her to see that she was killing herself, planning days out hoping she'd have something to look froward to which would distract her (only to have them all ruined and cancelled as she'd be drinking again), genuinely thinking that after every big conversation I'd actually got through to her and she'd now finally realised what needed to be done <hollow laughter> Trying to manage and resolve it, basically. I remember when I learnt the 3 C's - you didn't cause it, you can't control it, and you can't cure it. That was a revelation. Never a truer set of words spoken.
In the end I left (well, actually she threw me out and I just didn't go back.) It took a lot of strength as I had loved her and it was hard to see her destroying herself. In one of our conversations she had admitted: "I know I'm fighting for my life here" so she knew it, which made it harder to leave. But I knew it was the only thing to do. I couldn't help her, she was beyond help, she didn't want help. She wanted to sit in her flat drinking and blaming everyone else. I could choose to get (further) dragged down by her or make a break. My presence wasn't going to change the outcome either way.
She died 6 months later. It was a surprisingly peaceful death, she was very lucky given that by that time she was in a cat and mouse situation of being hospitalised, released and getting herself re-admitted through drinking almost constantly. They were in the process of widening her oesophagus as it was effectively sealing up due to the amount of alcohol she was consuming and the resultant vomiting. She'd had minor tears and effectively died from one leaking slowly but I gather if it had been a major one that had ruptured violently it wouldn't have been a nice way to go. A woman posted on here not so long ago about her brother dying in this way and I recognised what she was discussing. My ex was 51 when she died.
She came from a very disadvantaged background and had risen to be an Oxford don and to work all round the world. Which made it even more tragic somehow.
I'm still supporting her now 85 year old mother who has never got over it.
Some people do recover. One of them is my gardener - after a 25 year addiction he did AA and has been dry and functional for years now. Part of the reason I employ him is because he's kept going winning that battle despite everything life has flung at him and I want to support him. But the truth is that recovery is extraordinarily rare. I'm now in another relationship and my partner used to work in alcohol cessation services (though we met quite randomly.) She's told me the stats on recovery and it's vanishingly low - something like 2% success to 98% failure. Sadly very few alcoholics permanently recover. Please don't waste your life and that of your child waiting/hoping that your partner will be in that minuscule minority. One thing I know - if an alcoholic is determined to recover, they will - without or without support. If an alcoholic hasn't got that determination they'll fail even if every bit of support in the world is made available to them.
There is tons of support for people in your shoes on the Alcohol Support threads. Pointy Things runs a great thread for those in your situation, I'd strongly suggest you look that up.
Sorry for the long post.
All the very best to you and your little one 💐