Personal advice requested

I want to break up with my therapist. (Needing to switch to another in the same practice due to my insurance--i.e., Kaiser.) Do I this by:
1. Sending her an email asking her to recommend someone else, or
2. Making an appointment and asking her then?

(Relatedly, my therapist's next available appointment is Dec. 2--I had to cancel an appointment back in August, then in September, and didn't make another appointment right away. Because I don't find her helpful.)

Thanks for the advice!