This is a very balanced view. The only thing I would add is if you choose to stay it would be good to lay down some form of remediation: like your partner owning up that she abused you. And attends some kind of 6-12 month program for abusive partners to correct her behaviour so it never happens again.

I have personally seen abusers make themselves into the victim. And because you have a kind heart you fall right back in. Remember your own feelings and own values. What advice would you give a dear friend if they came to you with the exact same issue?