Most Helpful Girl
First off, get help. You clearly don't have the money or willpower to deal with the situation properly so find help.
Second, consider this. The person you are living with right now is nothing like the person you were dating before and certainly nothing like a man who's supposed to be a father. What makes you think that he won't abuse your daughter too when she grows up? Staying there will not make you happy. How many years of your life do you need to waste with him before you understand this?
Trust me on this, you're better off without him. Call a hotline, and maybe a lawyer. Get it sorted before it's too late.
What you're describing isn't Stockholm Syndrome.
I had a father like that and my mom took 10 years to leave him. He's now a jobless bum and my mom is much happier with a better guy.