Good for you for not considering for a second his attempt to stay with you.

“Let’s decide together.” Um no. One person’s decision is enough.

Also, rule of thumb: guys who refer to women as “crazy” are sexist and they’re probably lying. I don’t care if she’s doing objectively bizarre things. Maybe she has a mental illness or is traumatized, but that’s not what guys mean when they call women crazy, is it?