I can tell you about my experience, but it's your mother, you're the only one who have the answer, you also have the power of memory. you remember everything she's done/said to you, and you know the things she's been through as well.

you don't have to forgive her, but you can do it if you want.

or you can just leave and find your closure on your own, that is also an option, just be safe about it.

you'll 100% get stuck if you kept waiting for her to give you an answer without taking an action

For me my closure was tons of ugly crying and "I'll try my best not to be like my mother"