Hi SteelBlue.
You’ll get more then just a small sparkle, the fact that you have come here and already stated you don’t want to be in the relationship anymore is two absolutely massive steps and you can 100% do this!
I’m guessing your biggest fear of leaving is losing your children. What’s the reason why you think you will lose them? It shouldn’t even come to that, you should be able to leave an abusive relationship without this fear.
Do you feel in any immediate danger? Have you told your partner you want to the end the relationship?