When do you give up on someone who's self destructive? (Tw abusive relationship)

I'm exhausted. I need advice about a family problem.

My mom suffers abuse from a man (not my father) He's nearly killed her twice before.

I'm the only one left helping her and being there for her. She's tried to leave him 8 times now. I'm writing this after the eight failed attempt. She's addicted to him. Keeps going back. Says she loves him.

The cycle continues.

The rest of my family (brothers and our father, her ex) have given up. I'm the one who always moves her and all her stuff. I'm the one who gets all the berating and threatening texts from her abuser.

I love my mom. I'm scared he'll kill her one day.

I'm so angry at all my family members who have given up. Even though I understand them.

The police can't to anything since she won't press charges.

I feel like I can't to this anymore. I don't know if I have the energy. I just got married. I want to build my life.

I'm grateful for my husband. He helps everytime. But I don't want to burden him with this anymore.

Do I leave her? How?