I have felt something like this happening to me lately. Uninterested in dipping back into the drama is the BEST description I could ever come up with.
It is much easier for me to set a boundary and stick with it if I am not caught up in my own hysteria.
As far as it being out of character, YES, I have been feeling that way. I briefly wondered if I had some sort of brain tumor or other mood-altering anomaly because this is just SO out of character for me!