Thank goodness you are safe now. His tears and frustrations and mean words and manipulation a might make you feel sad or angry, but trips to the emergency room or the morgue are a lot more painful.

Stay where he can't hurt you. You are out!! That is the hardest part, actually getting out. Once you get out, STAY out until you gain perspective. This takes more than a few days. If you go back now, his behavior could escalate even further, you could be in more danger.

Oh, your original question. I have 3 abusive exes. They all promised me change a thousand times. As far as I know, they are all continuing to be abusive to their new partners. Abusers can change but it takes really hard work, determination, and counseling. Mostly they promise change to appease you, nothing more.

Good luck and here's a hug!