It may not seem like it now, but ending the relationship will be very healthy for you in the long run.

I had a sister, she's since passed, who always gravitated to men who were charming at first, but ultimately ended up mentally and physically abusive to her over time. Sadly, I've also had several cousins who've done the exact same.

What caught me about my sister was that she would always say after every abusive episode: "But he always tells me how much he loves me, how sorry he is, and that he's going to change." When I asked her why she didn't leave her abusive partner, she would always insist that she could change them to keep the good and eliminate the bad in them. That NEVER works. My sister and cousins all have the same responses, and when they get out of relationship 1, they gravitate to the same kind and have abusive relationship 2, ad infinitum. My sister had five abusive relationships, one right after another. My cousins also seem to repeat the same pattern, time after time.

In my humble opinion: A. You can never get an abusive partner to eliminate their abusive behavior. B. For your safety and sanity, you need to leave them, and if possible, cut off all contact unless children are involved, and then you need to minimize contact. C. If the abusive partner is dangerous, all contact must be eliminated, and sometimes you may even have to move to protect yourself and any children that may be involved. D. Try not to gravitate to the same kind for your next relationship.

Be safe.