Dear Mommy ,
I am sorry that you have to go through all that In front of your kids and in your condition but I have to ask you , is that the environment that you want to bring up your childreen ? I have lived with a man like that once for four years till the day that I realised that it wasn't only about me but my baby also and I wanted a better environment for her , if your boyfriend is abusing you now and you aren't even married I will advise to leave while you can for the sake of your kids , get some help with the domestic violence institutions and remember that God never forsakes his childreen .
I agree and he will not get better mostly they remain abusive, its also not good for the kids to see this violence how do you know he wont turn on them.I say you should consider leaving for the children's sake .have you family would help you ?
Get in touch with Domestic Violence intervention programs in your community. They understand ALL of your thoughts and fears, ALL of his thoughts and internal dynamics, ALL of your options and obstacles to implementing them. They are motivated to help you and with compassion.
Most of all, seek God for wisdom, guidance, courage and people to connect with.