How do I deal with a mentally ill family member without being dragged down myself?

How do I keep myself happy and positive when I have to deal with emotional blackmail, manipulation, lying, judgment, criticism and a general attitude of negativity on a daily basis?
Sometimes it gets overwhelming and I feel mentally exhausted.
I know this person is mentally ill and abandoning them is not an option.
P.S. It's not my spouse! 😜

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curiosi · 61-69, F

It's really hard! With practice you teach yourself to detach, go someplace else emotionally. While they rant you look at them and pay attention to their facial features or a spot on the wall behind them. Like I said really hard but you have to try not to take it in.

NineLives · 41-45, F

That's great advice. I will have to try that!
I'm sure that it will take a lot of practice though.