If you bring up your concerns about the way you are being treated and the person continues to mistreat you or you continue to feel unhappy and unsafe in the relationship, then you know enough to leave.
If you don’t even feel that it is safe to express your concerns and share your feelings, then you know it’s time to exit the relationship.
If you feel safe expressing your unmet needs and your feelings of unhappiness with the relationship, and the other person listens, understands, and makes changes to their behavior, then it is likely the person is not a narcissist and the relationship may improve if you both keep working on it—communication and changes in behavior must be consistent, respectful, and fair.
And, if, for whatever reason, you choose to remain in a relationship that is making you feel bad, then you may need some professional help in finding out why you prefer to define yourself with victimhood/martyrdom rather than wanting a good relationship of partners and equals.
=======================
They were monetized but I am giving them away for free here.
If you feel inclined to support my writing, here's my paypal
And if you prefer to pay it forward, I recommend Safe Place as an excellent place to support.