@fartasapissed2 I've read all your posts but not the whole thread.
I'm concerned about your upcoming marriage and I think you should be too (I understand its booked etc)
You're drinking heavily now because your fiance is leaving you so unsupported, isolated & vulnerable. Yes marriage would give you some financial protection that you don't currently have in case of divorce but I'm not confident marriage is going to do you any good:
He wants a pre nup - do you have one? Is it fair or favourable to him? Does it recognise the monetary value of your contribution to the marriage, which is typically undervalued and what a standard divorce would protect?
He doesn't want you to return to work and wants to be the tradional masculine provider
He gives you an allowance
Do you have full oversight of all finances? Or won't he let you see them?
Do you have a joint account?
How is spending split? What are you expected to pay for out of your allowance?
There are red flags in your post for financial abuse and that's before we get to the fact he's dismissing your very valid concerns about your drinking...
Does he know you're struggling with the isolation and being mum to an infant? How does he support you with this?
I'm in my 30s and I look back to when I was 24. My friends and I...We were still so young. I'm worried you're signing up to a situation you'll come to regret.
Put it this way, you're dependent on this man in every way and you're already so unhappy you've developed alcoholism. Is marrying him really the best choice for you and your child?