What are you NOT willing to change for a relationship?

Some people aren’t willing to change anything whatsoever, not even for the person they love. What are you NOT willing to change for your relationship?

I am willing to change some parts of my personality such as my temperament but I am NOT willing to change most things about my appearance, such as my hair or getting augmentations.
What are you NOT willing to change for a relationship?
What are you NOT willing to change for a relationship?
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