Hi Summerstars,
Thank you for your post. I’m sorry to hear about your situation. Its important you go to a safe place first- I would not suggest explaining this to him in person- you are not obligated to him in any way and you are not responsible for how he reacts.
Abusive men can escalate when they feel they are losing the control so I would encourage you to contact your local domestic abuse service if you haven’t already. They can support you with making a safe plan to leave.
Once you are safe you may want to seek legal advice around child contact going forwards. Rights of Women can provide free legal advice over the phone. They have a family law line which you can call regarding children and child contact issues.
Take care and keep posting
Lisa